シーユー・トピア List of Products and Services

This document introduces ESG management, which is essential for a company's sustainable growth strategy. It explains methods aimed at achieving decarbonization management from the perspectives of economic viability, environmental sustainability, and environmental value. It also includes examples of improving water quality and reducing electricity usage, CO2 emissions, and management costs through the power of copper ions. In recent years, compliance with environmental regulations in the manufacturing industry has become an indispensable element for sustainable corporate operations. There is an increasing demand for the practice of decarbonization management from the perspectives of requests from business partners, energy cost reduction, and enhancement of corporate image. [Contents (partial)] ■ What is sustainable ESG management? ■ The importance of sustainability ■ Environmental laws and regulations imposed on the manufacturing industry ■ Putting ESG management into practice ■ Decarbonization with Cu energy *For more details, please download the PDF or feel free to contact us.

• Other environmental measures and recycling

"Cu Energy" is a system that purifies cooling water used in factories and building air conditioning through the action of copper ions. The action of copper ions performs "deposits detachment and dissolution" in the circulating cooling system, leading to improved cooling efficiency and energy savings. Since no chemicals are used at all, it has a low environmental impact and enables safe and secure water quality purification with consideration for the environment. **Effects of Cu Energy** Economic benefits: Significant reduction in electricity costs, chemical costs, maintenance costs, and wastewater treatment costs. Environmental benefits: Reduction in CO2 emissions and decreased environmental impact due to the absence of chemicals. By introducing it as a first step in your ESG initiatives, there are also ripple effects such as: - Promotion of decarbonized management - Enhancement of your company's brand image - Maintenance of price competitiveness *For more details, please download the PDF or feel free to contact us.*

• others

"Cu Energy" is a water quality purification system that utilizes the "action of copper ions" for cooling water used in factories and building air conditioning. Since it does not use any chemicals, it has a low environmental impact and is a safe and secure water quality purification system that takes the environment into consideration. 【Cost Reduction with Three Zeros】 ■ Zero use of chemicals ■ Zero discharge of chemically treated water ■ Zero impact on the water environment In addition to reducing management costs, it also enables a reduction in the effort and time required for management, thus contributing to work style reform, labor shortages, and environmental improvement. *For more details, please download the PDF or feel free to contact us.

• Septic tank

"Cu Energy" is a purification device that is tasteless, odorless, harmless, and has deodorizing effects, designed with safety and environmental considerations in mind. It purifies without using any chemicals, relying solely on the chemical reactions of generated copper ions, which prevents water quality deterioration caused by chemicals. Additionally, it only requires electricity for operation and does not need to be used continuously, making it highly cost-effective. [Features] ■ Environmentally friendly ■ Comfortable and safe ■ Cost-effective *For more details, please download the PDF or contact us.

• Other water treatment equipment

"Cu Energy" is a system that purifies water using the power of copper ions. This product is a device that purifies industrial water and cooling water using the "power of copper." It purifies water quality with copper ions, making it "tasteless and odorless," and of course, it does not use any chemicals, making it an environmentally friendly and safe water purification system. The PDF below includes installation examples and methods, so please download it and take a look. 【Features】 ■ A device that purifies industrial water and cooling water using the "power of copper" ■ Purifies water quality with copper ions ■ Tasteless and odorless ■ Does not use any chemicals ■ An environmentally friendly and safe water purification system *For more details, please refer to the PDF document or feel free to contact us.

• Other water treatment equipment

"Cu Energy" is a revolutionary device that purifies industrial water and cooling water using the "power of copper." It purifies water quality with the "power" of copper, making it "tasteless and odorless," and of course, it does not use any chemicals, making it an environmentally friendly and safe water purification system. By applying electricity to copper, copper ions are generated and suspended in the water to purify the water quality. [Product Lineup] ■ Open type (TS series) ■ Pressurized type (WH series) *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We would like to introduce the mechanism of our copper ion generation water treatment device, 'Cu Energy.' This revolutionary device purifies industrial water and cooling water using the "power of copper." It cleanses water quality with copper ions, ensuring it is "tasteless and odorless," and of course, it does not use any chemicals, making it an environmentally friendly and safe water purification system. By applying electricity to copper, copper ions are generated and suspended in water to purify the water quality. 【Features】 ■ A system that purifies water using the power of copper ions ■ Tasteless and odorless ■ Does not use any chemicals *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We will introduce the mechanism of water quality purification in rust and scale using the copper ion generation water treatment device "Cu Energy." The copper ion molecules generated by this product have two "+" electrons, making them unstable and floating in the water. By utilizing the tendency of these unstable copper ion molecules to float and attempt to steal "−" electrons (ionization and chemical reaction), they can take "−" electrons from floating and adhering substances such as iron and calcium in the water and pipes, preventing detachment and re-adhesion. 【Features】 ■ Removal of rust and scale through chemical reactions with copper ions ■ Stealing "−" electrons from molecules with a lower monopolar potential than copper ■ Ionized rust and calcium float in the water without adhering *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

Introducing the mechanism of water quality purification in algae and slime using the copper ion generation water treatment device "Cu Energy." Copper ions have a trace metal effect that can kill bacteria, exhibiting remarkable antibacterial effects even in very small amounts. It is said that copper ions enter the cells and inhibit the function of enzymes, leading to the death of bacteria. By using this product, it is possible to prevent the occurrence of troublesome algae, slime, and harmful bacteria and viruses in advance, enabling proper equipment management and hygiene control. [Typical examples where copper ions are effective] ■ Legionella bacteria ■ E. coli / MRSA ■ Algae / slime *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

This is an introduction to the comparison of characteristics in water quality management using the copper ion generation water treatment device "Cu Energy." In general chemical purification, residual toxicity can be present due to the chemicals used, and there can also be corrosive effects on equipment. In contrast, our product purifies without the use of chemicals, resulting in no toxicity and almost no corrosiveness. Cooling tower blowdown treatment requires several instances during the initial introduction, but after water quality stabilizes, the frequency can be significantly reduced. Additionally, there is no need for wastewater treatment costs or water quality management equipment. 【Characteristics】 ■ Residual toxicity: No toxicity due to the absence of chemicals ■ Impact on equipment: Almost no corrosiveness due to the absence of chemicals ■ Cooling tower blowdown treatment: Several instances required initially, but frequency can be greatly reduced after water quality stabilizes; no wastewater treatment costs ■ Water quality management equipment: Not needed with this device alone *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We will introduce a case study that verified the energy-saving effects due to improved cooling efficiency from water quality enhancement. In the cooling tower of Company D's factory (100 tons of refrigeration), the power consumption of the compressor was measured and tracked from the time of trial introduction. By circulating copper ions, about half of the scale was removed after 120 days. The reduction in scale is proportional to the decrease in power consumption. Furthermore, it is estimated that after one year of operation, complete scale removal and approximately a 20% reduction in power consumption can be achieved. 【Case Summary】 ■ Measured Effects of Introduction - Scale reduction: 50% - Power consumption reduction: 10% ■ Continuing Effects of Introduction - Complete scale removal: 100% - Power consumption reduction: 20% *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We will introduce a case study based on Company D's implementation of "Cu Energy," simulating the energy-saving effects of compressors. In the case of one unit, before implementation, the annual energy consumption was 86,352 kWh over 257 days, with an annual electricity cost of 949,872 yen (11 yen/kWh). After implementation, the energy consumption was simulated to decrease by 17,476 kWh per year, resulting in a reduction of electricity costs by 192,236 yen per year. The introduction of this product is expected to lead to cost savings in chemical expenses, as well as energy savings and CO2 reduction. For more details on the simulation, please refer to the published catalog. 【Before Implementation (×1 Unit)】 ■ 24H Energy Consumption: 336 kWh/24H ■ Annual Energy Consumption: 86,352 kWh/257 days ■ Annual Electricity Cost: 949,872 yen (11 yen/kWh) ■ CO2 Emissions: 36,095 kg-CO2/kWh *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We would like to introduce a case where the copper ion generation water treatment device "Cu Energy" has led to a reduction in chemical costs and maintenance costs. In the case of a textile-related company, the copper ion water caused the "algae" to die off and the "scale" to dissolve, resulting in several blow treatments. After stabilizing the water quality, the blow treatments were reduced to a minimum, thereby lowering maintenance costs. In the case of a steel-related company, rust decreased and water quality improved within approximately four months of implementation. By continuously circulating copper ion water, it became possible to remove and suppress rust and corrosion inside the pipes, contributing to a reduction in the frequency of equipment updates and overall cost savings. [Case Overview for Textile-Related Company] ■ Issues Considered: Cooling tower wastewater environmental measures & maintenance cost reduction ■ Maintenance cost before implementation: Approximately 10 million yen/year ■ Maintenance cost after implementation: Approximately 5 million yen/year *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We would like to introduce a case study of the installation of the copper ion generation water treatment device 'Cu Energy' at a major chemical products company in the Tokai region. The company conducts regular maintenance every year. It has been operating normally for many years and demonstrating high effectiveness. By checking the condition and operating status of the copper electrodes, it is possible to maintain reliable effects over a long period. Our product has been implemented in various businesses, including hotels, shipbuilding and steelmaking, textiles, shopping centers, and hot spring facilities. 【Case Overview】 ■ Cooling Tower Before Installation - Rust observed on the outside, scale deposition on the inside - Algae growth in the lower water tank of the cooling tower, rust present on surrounding metal parts ■ Cooling Tower After Installation - No rust on the outside, no scale deposition on the inside - The lower water tank of the cooling tower is clean, and there is no rust on surrounding metal parts *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

Introduction to the specifications and selection guidelines for the copper ion generation water treatment device "Cu Energy." We offer both open type (TS series) and pressurized type (WH series) models. The effective circulation water volume is available in products for each unit at ~50m³/h, ~100m³/h, and ~150m³/h. The cooling tower capacity guidelines are 40–180RT, 180–350RT, and 350–450RT. Please refer to the catalog for more details. 【Open Type (TS Series) Specifications (Partial)】 ■ Models: TS-100/TS-300/TS-500 ■ Effective circulation water volume m³/h: per unit ・ TS-100: ~50m³/h ・ TS-300: ~100m³/h ・ TS-500: ~150m³/h *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We will introduce the installation methods for the copper ion generation water treatment device "Cu Energy." Typical installation methods include integrating it into the cooling water piping or the make-up water piping, or generating copper ion water in a storage tank for supply. This product can be used without the need for extensive modifications or construction of existing facilities, so please feel free to contact us if you have any requests. 【Typical Installation Methods】 ■ Integrating into cooling water piping ■ Integrating into make-up water piping ■ Generating copper ion water in a storage tank for supply *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We would like to introduce a request to ensure that you can reliably experience the effects of the copper ion generation water treatment device "Cu Energy." Please be sure to use it with equipment that utilizes industrial water or process water. If you plan to use well water, a water quality test must be conducted in advance, and verification of effectiveness is necessary. Immediately after installation, debris such as rust, algae, and scale may occur, so please remove them. Proper treatment and appropriate disposal of wastewater through blow-off are required. We also recommend a regular maintenance contract. 【Points to Note】 ■ Be sure to use it with equipment that utilizes industrial water or process water. ■ Conduct regular blow-off treatment for about three months after installation. ■ We recommend a regular maintenance contract. *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

"Cu Energy" is a system that effectively purifies industrial and process water using the power of copper ions. It can suppress scale, rust, algae, and bacteria all in one unit, without the need for chemicals, ensuring safety and environmental consideration. It operates on minimal electricity, contributing to reduced running costs. The system achieves maximum effectiveness when installed in cooling water piping, stabilizing water quality simply by being powered on. Installation is easy, making daily water quality management much simpler. 【Features】 ■ Achieves more effective water quality management ■ Breaks down scale and rust with copper ions ■ Suppresses algae, E. coli, MRSA, and Legionella bacteria ■ Maximizes effectiveness when installed in cooling water piping ■ Stabilizes water quality and reduces running costs just by being powered on < Please check the specifications and technical documents from the catalog download button below. >

• Water treatment equipment

"Cu Energy" is a groundbreaking system that cleans industrial water and process water using the power of copper ions. Compared to conventional chemical cleaning, it enables more effective water quality management. By using copper ions, it decomposes scale and rust that occur when water absorbs carbon dioxide from the air. Additionally, copper ions have a trace metal effect, allowing them to exhibit remarkable antibacterial properties even in small amounts. [Features] ■ Achieves more effective water quality management ■ Decomposes scale and rust using copper ions ■ Capable of eliminating algae, E. coli, MRSA, and Legionella bacteria ■ Most effective when installed in pipes before cooling water comes into contact with air ■ Once water quality stabilizes, simply energizing the product maintains stable water quality *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

This document explains the applications and effects of copper ion water generation devices. It includes an overview of the cooling tower mechanism, issues with water cooling systems, the effects and characteristics of copper ions, and the benefits that can be obtained from them. Additionally, three case studies are also presented. In addition to detailed explanations, there are many images, making it a user-friendly reference book. [Included Items] ■ Target ■ Issues with water cooling systems ■ Current status of the issues ■ Effects and characteristics of copper ions, and the benefits obtained from them *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We would like to introduce a case study of a solution using water treatment equipment at N Iron Works. The dark brown substance seen inside the cooling tower is called scale, which consists of calcium and magnesium. Once it precipitates, it is difficult to remove and can occur not only in the cooling tower but also inside the piping, reducing cooling efficiency and obstructing water flow. However, this issue can be resolved by using copper ions. Copper ions alone can address scale, rust, algae, and bacteria, and they have a minimal environmental impact. 【Effects and Features of Copper Ions】 ■ Copper ions alone can address scale, rust, algae, and bacteria ■ The mechanism of action is clear ■ Minimal environmental impact *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We would like to introduce case studies of solutions using water treatment equipment at D Industry and O Pharmaceutical. D Industry experienced the occurrence of bright red rust inside their cooling tower, which caused the corroded metal to become brittle, posing a risk of damage accidents. O Pharmaceutical faced slime formation inside their equipment's tank, which not only obstructed water flow but also led to the proliferation of harmful bacteria. However, copper ions can effectively address rust and algae. The mechanism of action is clear and has been chemically proven. Please feel free to contact us if you have any inquiries. 【Effects and Features of Copper Ions】 ■ Copper ions alone can address scale, rust, algae, and bacteria ■ The mechanism of action is clear ■ Minimal environmental impact *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We would like to introduce a case study of a solution using water treatment equipment at I Commercial. The company experienced algae growth in their cooling towers, which worsened cooling efficiency and obstructed water flow. Even after dying, the algae became food for microorganisms (various bacteria), creating an ideal environment for the proliferation of Legionella bacteria, which can easily reproduce and become airborne. However, this issue can be resolved by using copper ions. This method can be implemented independently, and the amount of copper ions discharged is extremely low, functioning at about 1/10 of the maximum limit set by water quality standards. 【Effects and Features of Copper Ions】 ■ Copper ions can address scale, rust, algae, and bacteria on their own. ■ The mechanism of action is clear. ■ Environmental impact is minimal. *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

This document explains the changes in electrical conductivity and the effects of copper ions. It provides a detailed introduction to the changes in normal electrical conductivity, the changes when copper ions are effective, the changes after their effectiveness, and the process until purification is complete. It also includes information on the trends in blow frequency. Each section is clearly explained with graphs, making it a useful reference. [Included Topics] ■ Changes in normal electrical conductivity ■ Changes when copper ions are effective ■ Changes after the effectiveness of copper ions ■ From the effectiveness of copper ions to the completion of purification *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

We would like to introduce a case study of the implementation of "Cu Energy" for an agricultural corporation. The agricultural corporation was facing the issue of using well water, which had poor cost-effectiveness. They consulted us about whether "copper ions could dissolve and detach scale to solve this problem," and we decided to conduct a demonstration. Ultimately, six demonstrations were verified by a third-party organization, and the agricultural corporation successfully shipped their products. [Challenges] - In recent years, the watering tubes and the subsequent irrigation tubes have been clogged with "scale," preventing effective irrigation, leading to the purchase of new watering hoses. - As a cost-reduction measure, they replace the "used watering hoses and tubes with new ones" twice a year. - The costs for replacing the watering tubes inside the greenhouse and cleaning the clogged hoses and tubes, as well as labor costs, have been rising year by year, resulting in poor cost-effectiveness. *For more details, please download the PDF or feel free to contact us.*

• Other water treatment equipment

We will introduce a case study based on Company D's implementation of "Cu Energy," simulating the energy-saving effects of compressors. In the case of one unit, before implementation, the annual energy consumption was 86,352 kWh over 257 days, with an annual electricity cost of 949,872 yen (11 yen/kWh) (reference electricity unit price from 2017). After implementation, the energy consumption was simulated to decrease by 17,476 kWh per year, resulting in an annual electricity cost reduction of 192,236 yen. The introduction of this product is expected to lead to cost savings on chemicals, as well as energy savings and CO2 reduction. For more details on the simulation, please refer to the published catalog. 【Before Implementation (×1 unit)】 ■ 24H energy consumption: 336 kWh/24H ■ Annual energy consumption: 86,352 kWh/257 days ■ Annual electricity cost: 949,872 yen (11 yen/kWh) *Reference electricity unit price from 2017. ■ CO2 emissions: 36,095 kg-CO2/kWh *For more details, please download the PDF or feel free to contact us.

• Water treatment equipment

This document provides an explanation of the effects of copper ions, specifically regarding the relationship between copper ions, slime, and algae. It discusses that slime is formed by microorganisms, the effects of copper ions, visual assessment of slime, and contributing factors. Additionally, it explains that the types of algae related to cooling towers include cyanobacteria, green algae, and diatoms, as well as the binding of copper ions to enzymes. We encourage you to download and read it. 【Contents】 ■ Slime ■ Effects of Copper Ions ■ Visual Assessment of Slime Effects ■ Factors of Slime ■ Algae ■ Effects of Copper Ions *For more details, please download the PDF or feel free to contact us.

• others

In the operation of cooling towers, maintenance and cleaning of heat exchange tubes are important. It is recommended to clean the condenser annually. The adhesion of hard components such as silica and calcium, as well as biological contaminants like slime, can lead to a decrease in the performance of the refrigeration unit. Using chemicals to soften hard scale for cleaning is effective and therefore recommended. [Overview] ■ Cleaning is recommended when the condensing temperature at 100% load is equivalent to 2°C or higher 　→ A 7% reduction in electricity consumption can be expected ■ 1.2 million kW × 60% users × 7% electricity savings 　→ Equivalent to a potential reduction of 50,000 kW *For more details, please feel free to contact us.

• Cooling system

"Cu Energy" is a system that purifies water using the power of copper ions. This product is a groundbreaking device that purifies industrial water and cooling water using the "power of copper." It purifies water quality with copper ions, making it "tasteless and odorless," and of course, it does not use any chemicals, making it an environmentally friendly and safe water purification system. The PDF below contains installation examples and methods, so please download it and take a look. 【Features】 ■ A groundbreaking device that purifies industrial water and cooling water using the "power of copper." ■ Purifies water quality with the power of copper ions. ■ Tasteless and odorless. ■ Does not use any chemicals. ■ An environmentally friendly and safe water purification system. *For more details, please refer to the PDF document or feel free to contact us.

• Other water treatment equipment

The "Cu Corona Buster Mini" is a copper ion water generation device that uses 99.99% pure copper and the electrode electrolysis method to generate "Cu2+" ions. With a copper ion concentration of 0.5 to 1 mg/L, it is harmless and tasteless, odorless, and within the drinking water quality standards. There are no concerns about dangers like those posed by ethanol or hypochlorite disinfectants, nor risks of equipment failure. Additionally, the copper ions that adhere to surfaces do not volatilize, allowing for long-lasting "antibacterial and antiviral effects." [Features] ■ Safe for use with consideration for people ■ Antibacterial and antiviral effects last for a long time ■ Zero toxicity and flammability; no corrosion of metals or degradation of rubber *For more details, please download the PDF or feel free to contact us.

• Other physicochemical equipment

Copper is the metal with the longest history, and its use dates back to 8000 BC. Copper has very superior properties compared to other metals. In recent years, especially, the trace metal action of copper (super antibacterial performance) has been attracting attention. This page introduces the main features of copper. Copper is the metal with the second highest electrical conductivity after silver, and it serves as the standard for the electrical conductivity of metal materials. Due to this property, it is widely used as an essential component in electronic devices. *For more details, please feel free to contact us.

• Other metal materials

The main physical properties of pure copper are shown below. The physical properties of various types of copper and copper alloys specified in JIS and other standards are defined properties. Metals are bonded by free electrons. Both electricity and heat are transmitted by the movement of "free electrons," so they exhibit the same tendency. Mechanical properties refer to various characteristics related to mechanical deformation and failure. The main mechanical properties of copper and copper alloys are "tensile strength," "yield strength," "elongation," "bend," "hardness," and "spring limit." *For more details, please feel free to contact us.*

• Other metal materials

With the advancement of information technology, many communication and electronic devices that continue to evolve use copper and copper alloys. In particular, the development of copper alloys with excellent high strength, high temperature resistance, and high conductivity is progressing, and they are actively used as conductive materials for semiconductor elements such as lead frames. Additionally, they are used in printed circuit board wiring, which is widely used in computers, peripheral devices, television and audio equipment, and gaming devices. In communication devices such as telephones, materials like phosphor bronze and nickel silver are widely used in connectors, transistor caps, crystal oscillator cases, and relays, playing an important role. *For more details, please feel free to contact us.

• Other metal materials

Electric vehicles, including Shinkansen trains, passenger cars, buses, trucks, and motorcycles, use thousands of parts. Various copper products are used in their main components, including electrical parts, radiators, gaskets, fuel systems, and pressure regulators. Wire harnesses connect to various electronic devices installed in the vehicle, transmitting vast amounts of information and energy to control their functions. In other words, without wire harnesses, a car would hardly be able to operate. They are truly the lifeline of the vehicle. The essential raw material for these important wire harnesses is copper. *For more details, please feel free to contact us.*

• Other metal materials

Copper and copper alloys are used in various components such as clocks, cameras, measuring instruments, and surveying equipment. This is because the excellent workability and wear resistance of copper, along with its non-magnetic properties, make it suitable for precision instruments where accuracy is crucial. Furthermore, many copper alloys have been developed that possess workability, corrosion resistance, and non-magnetic properties while achieving strengths comparable to carbon steel and special steel, contributing to the miniaturization of precision equipment. *For more details, please feel free to contact us.*

• Other metal materials

Copper has been used as a building material since ancient times due to its excellent workability and durability. Particularly as roofing material, it has been favored for its workability that can accommodate various roof shapes and its unique color changes, such as verdigris. Additionally, it has excellent corrosion resistance, and compounds like verdigris that form on the surface of copper in the atmosphere act as a protective film, preventing the progression of corrosion and serving this role over many years. The beautiful colors of copper are widely used as high-end interior and exterior materials. *For more details, please feel free to contact us.

• Other metal materials

Copper is widely used in cooking tools such as pots, kettles, and frying pans, as well as in cups, tea sets, and tableware. Copper cooking utensils are favored by professional chefs and those who seek a refined taste due to their excellent heat conductivity. An essential component of Japanese sweets is "anko." The flavor of anko, created from adzuki beans and sugar, is uniquely loved by many Japanese people. Moreover, it is well known among wagashi artisans that copper pots are suitable for making delicious anko. *For more details, please feel free to contact us.*

• Other metal materials

Ancient civilizations are said to have developed in the order of the Stone Age, followed by the Copper and Bronze Age, and then the Iron Age. Copper has a history as the first metal used by humans. It is believed that copper was first used around 7,000 to 8,000 BC. In ancient Egypt, around 5,000 BC, it is known that copper was used for everyday tools, decorative items, and weapons. Subsequently, around 4,300 BC, copper smelting was conducted, and around 3,700 BC, bronze containing 10 to 14% tin was produced. Brass was first created by the ancient Romans just before the birth of Christ, containing 17.3% zinc, and was used as currency. *For more details, please feel free to contact us.*

• Other metal materials

Do you know that there is copper in the human body? Copper is obtained from many foods and plays an important role in our health. The human body contains about 80 to 100 mg of copper. Copper is referred to as an "essential trace element" and plays important roles in producing blood, maintaining normal bones and blood vessels, and supporting brain function. The daily requirement for copper is about 2 mg, and it can be naturally supplemented by eating a balanced diet. Foods that are high in copper include oysters and liver (20 to 30 mg/kg), as well as grains, legumes, and nuts. *For more details, please feel free to contact us.*

• Other metal materials

Copper and copper alloys retain high value even after use, which has led to the establishment of a recycling system that collects and regenerates materials from upstream to downstream. Used copper is actively collected and recycled. The actively collected copper and copper alloys are sorted and categorized by raw material recycling companies. The raw materials are classified into 32 categories according to the Japanese Industrial Standard JIS H 2109 "Classification Standards for Recycled Copper and Copper Alloys." By sorting and categorizing based on this standard, the quality of recycled materials is ensured. *For more details, please feel free to contact us.*

• Other metal materials

The Japan Copper Center conducted its own research and summarized the actual situation of "copper resource circulation." As a result, it was found that the recycling rate of recovered "copper" exceeds 80%. In this way, copper is continuously recycled as a "valuable metal," and it will continue to contribute to the realization of a resource-circulating society in the future. *For more details, please feel free to contact us.

• Other metal materials

Various types of pipes, such as plastic pipes and stainless steel pipes, are used for water supply and hot water supply systems. Among them, copper pipes are characterized by their durability, ease of recycling, and low carbon dioxide (CO2) emissions from manufacturing to installation. The global common goal of achieving carbon neutrality by 2050 has been set, and copper is highly regarded as an eco-material. *For more details, please feel free to contact us.*

• Other metal materials

The Japan Copper Center, a general incorporated association, has compiled valuable questions regarding copper into a Q&A format. We offer categories such as "super antibacterial performance," "thermal and mechanical properties," "corrosion resistance and durability," "patina," "blue water," and "products, construction, processing, and surface treatment." Additionally, we also introduce topics related to "standards, certifications, and qualifications." Please take a look. 【Published Categories (Partial)】 ■ Super Antibacterial Performance ■ Thermal and Mechanical Properties ■ Corrosion Resistance and Durability ■ Patina ■ Blue Water *For more details, please feel free to contact us.

• Other metal materials

On the Japan Copper Center's website, we have published a Q&A regarding "super antibacterial performance" related to copper. We introduce questions such as, "I read in some book that putting copper in a vase helps flowers last a little longer; what is the mechanism behind this?" We also provide answers to other questions, such as "What is the mechanism of deodorizing effects?" and "I am processing wild vegetables with copper plates; is it harmful or harmless?" 【Excerpt of Q&A】 ■ I am processing wild vegetables with copper plates; is it harmful, harmless, or a problem for food safety? ■ There are discussions overseas about copper causing cancer; what is the situation in Japan? ■ I use copper sake vessels; do copper and alcohol react in a harmful way? ■ Is the oxidation of copper pipes harmless? *For more details, please feel free to contact us.

• Other metal materials

On the Japan Copper Center's website, we have published a Q&A regarding the "thermal and mechanical properties" of copper. We introduce questions such as "How does copper expand with temperature increase?" and "When bending copper pipes, at what temperature do they become soft?" Additionally, there are questions about the coefficient of linear expansion, methods for calculating thermal expansion, and thermal conductivity. Please take a look. 【Published Q&A (Excerpt)】 ■ It is said that copper pots have good thermal conductivity; what types of dishes are they suitable for? ■ How much does the flare section of copper pipes used in refrigeration systems expand due to temperature changes? ■ How does the crystal structure of copper change when annealed (heat-treated)? ■ Regarding the thermal insulation properties of copper. *For more details, please feel free to contact us.

• Other metal materials