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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.*

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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.

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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.

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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.

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The Japan Copper Center's website features a Q&A section regarding "corrosion resistance and durability" of copper. It introduces topics such as "the corrosion resistance of brass (C3604B) to CO, CO2, NOx, and C3H8," and "the extent of galvanic corrosion that occurs when dissimilar metals are in close proximity." Additionally, it provides answers on topics like "the potential for corrosion due to the potential difference between copper and stainless steel" and "measures to prevent pitting corrosion in heat exchangers." [Excerpt of Q&A] ■ Is there a list of corrosion resistance substances for copper? ■ Does galvanic corrosion occur if the same copper alloy is made using different methods? ■ Is copper piping unsuitable for water that generally contains high levels of sulfate ions and chloride ions? ■ Is there a possibility of corrosion due to the potential difference between copper and stainless steel? ■ What is the expected lifespan of copper pipes used in water supply lines? *For more details, please feel free to contact us.

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The Japan Copper Center's website features a Q&A section regarding "verdigris" related to copper. We introduce topics such as "Does verdigris get absorbed through the body's mucous membranes?" and "How to handle verdigris and methods to prevent its occurrence." Additionally, we provide answers such as "To clean verdigris, wash it with acid" and "Regarding verdigris, the Ministry of Health has announced from three years of animal testing results that it is 'essentially harmless.'" 【Excerpt from Q&A】 ■ Is basic copper acetate also harmless like natural verdigris? ■ I want to use copper pipes as supports in my home garden; will verdigris affect the crops? ■ How to handle verdigris and methods to prevent its occurrence. ■ I want to artificially induce verdigris on copper as quickly as possible. ■ I want to adhere copper as thinly as possible on a coating; is there a good method? *For more details, please feel free to contact us.

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The Japan Copper Center's website features a Q&A section regarding "blue water" related to copper. It introduces questions such as "methods for oxidizing the interior of copper pipes using household appliances" and "detergents used for cleaning bathtubs." Additionally, it includes content on "how to confirm the cause of blue discoloration in the bathtub's water intake area and how to address it" and "methods to prevent the occurrence of blue water." 【Featured Q&A (excerpt)】 ■ Methods for oxidizing the interior of copper pipes using household appliances ■ Recommendations for good products for detergents used for cleaning bathtubs ■ How to remove dark blue stains and what methods can be used ■ How to confirm the cause of blue discoloration in the bathtub's water intake area and how to address it ■ Are there methods to prevent the occurrence of blue water? *For more details, please feel free to contact us.

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On the Japan Copper Center's website, we have published a Q&A regarding copper related to "products, construction, processing, and surface treatment." We introduce topics such as, "We use 15.88 insulated copper pipes for hot water heater piping, but are the water piping and air conditioning refrigerant copper pipes the same?" Additionally, we provide answers to questions like "What points should be noted when connecting existing galvanized steel pipes to copper pipes during water heater replacement?" and "Why does a 10-yen coin become clean due to the acidity of cola?" 【Published Q&A (excerpt)】 ■ We use 15.88 insulated copper pipes for hot water heater piping, but are the water piping and air conditioning refrigerant copper pipes the same? ■ What points should be noted when connecting existing galvanized steel pipes to copper pipes? ■ When bending 1/2 copper pipes using a bender, an internal pressure of 2.9 MPa is applied; is the strength okay? ■ If green rust occurs due to the influence of flux during construction, does it mean poor workmanship? *For more details, please feel free to contact us.

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On the Japan Copper Center's website, we have published a Q&A regarding copper related to "regulations, certifications, and qualifications." We introduce questions such as "Can copper pipes be considered non-combustible materials?" and "Are there training sessions or instructor dispatches for copper pipe brazing and soldering?" Additionally, we provide answers to questions like "Does using high-strength brass in food equipment violate hygiene laws?" Please take a look. 【Published Q&A (Excerpt)】 ■ Can copper pipes be considered non-combustible materials? ■ When using copper ion water for "cooking rice," "mochi," or "tea," is it treated as a "food additive"? ■ Does using high-strength brass in food equipment violate hygiene laws? ■ Why is there a difference between the inch designation for nominal diameter and the millimeter designation for outer diameter? *For more details, please feel free to contact us.

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Copper is a soft metal with moderate ductility, making it easy to shape. Various processing methods such as bending, cutting, pressing, and drawing can be employed, allowing for the machining of complex shapes. Additionally, brazing is also easy, which is advantageous for connecting pipes. Due to its excellent workability, copper makes on-site work easier and can be considered a material rich in constructability. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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A refrigerant-coated copper pipe is a copper pipe (original pipe) through which refrigerant flows, covered with insulation material. The copper pipe is highly workable and can withstand use even under high pressure conditions of the refrigerant. For air conditioning refrigerant piping, insulation materials such as polyethylene foam are applied to the outside of the copper pipe (original pipe) to prevent condensation. The Japan Copper Center has established standards for refrigerant-coated copper pipes. *For more detailed information, please refer to the related links. Feel free to contact us for more details.

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Flare connections involve flaring the ends of copper pipes and connecting them using flare nuts. Copper pipes are easy to work with, and processing them with specialized flare tools is straightforward. The shape and dimensions of the flare, as well as the tightening torque for the flare nuts, are based on JIS B 8607 (Flare and brazed pipe fittings for refrigerants). *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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CU STAR is a certification system established by the Japan Copper Center in 2017, aimed at widely promoting materials and products that utilize the super antibacterial properties of copper. So far, various items useful in daily life have received certification. There may be certified materials and products close to you. We certify those that meet the performance standards required by the Japan Copper Center standard "JCDA 0501 Performance Standards for Super Antibacterial Copper and Super Antibacterial Copper Products." *For more detailed information, please refer to the related links. Feel free to contact us for more details.

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The mechanism that brings about the super antibacterial properties of copper is as follows. Copper reacts with moisture to generate reactive oxygen species with strong oxidative power, which decompose the target molecules of bacteria and viruses. First, when bacteria come into direct contact with the copper surface, their outer membrane is ruptured. When the outer membrane, which is the greatest armor for the cell, is breached, copper ions mercilessly enter the cell. Copper attacks the contents of the cell and inhibits the metabolic processes that are essential for survival. As a result, the cell becomes unable to transport and digest nutrients, repair the damaged outer membrane, breathe, or reproduce. This mechanism weakens the entire bacterial cell. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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Starting with copper water pipes in ancient Egypt and copper pipes in water clocks during the Asuka period, copper has been used in various applications in our lives since the Bronze Age (around 3500–1200 BC). Its workability, along with the fact that the excellent antibacterial and antiviral properties of copper had not yet been proven through research at the time, is one of the reasons for its use. For thousands of years, copper has protected and supported human health and life. *For more detailed information, please refer to the related links. Feel free to contact us for more details.

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"Hospital-acquired infections," where patients contract another illness while visiting a hospital for treatment, became more pronounced during the COVID-19 pandemic. However, measures to address this issue have long been an important concern related to the trustworthiness of medical facilities. The Japan Copper Center has been working with medical institutions to utilize the super antibacterial properties of copper to prevent hospital-acquired infections. Additionally, the super antibacterial properties of copper have also been applied to medical devices. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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The super antibacterial properties of copper and its various biological effects improve environmental pollution caused by the development of daily life and industry, while simultaneously supporting further advancements in these areas. We will look at several examples of the effects and benefits of copper that contribute to a safer and more comfortable life for people. ■ Example: Purifying rivers and lakes with kitchenware ■ Example: Active use in sewage treatment plants ■ Example: Repelling pests in living environments and industries ■ Example: Protecting industry and infrastructure from the invasive zebra mussel *For detailed information, please refer to the related links. Feel free to contact us for more information.*

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The amazing power of copper is being utilized, and the world is expanding even more. The incredible power of copper has been useful since ancient times and continues to play a significant role in our lives today. Moreover, copper will be used even more in the future. It's exciting to think about where it will be active next. You can find it in many places inside your home. *For more detailed information, please refer to the related links. Feel free to contact us for more details.*

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Copper ore mined from the mine undergoes various processes to become raw material in the form of copper ingots. These copper ingots also go through various processes to be transformed into sheets, pipes, rods, and wires. Here, we will take the representative example of "copper sheets" and see how they are made. *For detailed information, please refer to the related links. Feel free to contact us for more details.*

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Ancient civilizations are said to have developed in the order of the Stone Age, Copper and Bronze Age, and Iron Age. Copper is the first metal that humans used. It is believed that copper was first used around 7,000 to 8,000 BC. In ancient Egypt, which everyone knows well from pyramids, it is known that around 5,000 BC, copper was used for everyday tools, decorative items, and weapons. After that, alloys made by mixing copper with tin and zinc were created and began to be used for currency as well. *You can view the detailed content of the article through the related links. For more information, please feel free to contact us.*

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Copper has many excellent characteristics. It is used in various aspects of our lives, taking advantage of these properties. Copper has been used in building roofs and walls for a long time. Due to its beauty, resistance to rust, and ease of processing, it is now also used in the interior and exterior of houses and buildings, including entrances, walls, handrails, door handles, and elevator doors. Additionally, it is used in plumbing for water supply and heating in kitchens and bathrooms, as well as in heating and cooling systems. *For more detailed information, please refer to the related links. Feel free to contact us for more details.*

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To conduct electricity well means that there are few things that obstruct (resist) the flow of electricity. Because there are few obstructions, electricity flows smoothly through copper. Utilizing this property, copper is used in electrical wires, transporting electricity from town to town and to everyone's homes. Inside the house, copper is indispensable for electrical appliances that use electricity. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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The ability of materials to conduct heat varies. For example, wood and cloth are not very good at conducting heat, but pots and kettles made of metal heat up quickly. While many metals are good conductors of heat, copper is particularly impressive because it conducts heat very well. That's why it is used in cooking utensils, and delicious dishes are made using copper. *For more detailed information, please refer to the related links. Feel free to contact us for more details.*

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There are many terrifying bacteria and viruses, such as O-157, Legionella, influenza, and norovirus, that can cause serious infections, but copper can effectively combat these pathogens. Isn't that amazing? The antibacterial properties of copper have recently gained a lot of attention, and it is increasingly being used in new antibacterial products. *For more details, you can view the related links. Please feel free to contact us for more information.*

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Compared to iron, copper is a soft metal that is easy to work with. It can be hammered, stretched, and pulled into various shapes. For example, the intricate parts found in complex instruments and clocks can be made from soft copper. Copper, which can be easily shaped, is actively used in many familiar places. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

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Used copper has the immortal power to be reborn as new copper. Scrap copper that has been used is collected, melted down, refined to become clean, and then solidified again to be reborn as products. It can be reborn over and over again, which is amazing. Used copper is highly valuable, so it is actively collected and recycled. Almost 100% of the copper scraps generated during the processing of parts are reused, and nearly 100% of electrical wires are recycled. *For more detailed information, please refer to the related links. Feel free to contact us for more details.

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