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  1. Home
  2. Chemical
  3. 大同化成工業 本社(東京都)、桶川工場(埼玉県)
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大同化成工業 本社(東京都)、桶川工場(埼玉県)

EstablishmentDecember 23, 1939 (Showa 14)
capital6000Ten thousand
number of employees96
addressTokyo/Chiyoda-ku/2-8-2 Neikanda, Katayama Building 2nd and 3rd floors
phone03-3256-1936
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last updated:Oct 10, 2025
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大同化成工業 Product Lineup

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Organic pigments (Pigment division) Organic pigments (Pigment division)
UV photosensitizer (Trade Division) UV photosensitizer (Trade Division)
Carbon black dispersion (coloring materials division) Carbon black dispersion (coloring materials division)
class="retina-image"

Permanent Red 2B-Sr Powder for Oily Liquid Inks

A reliable red that clears the challenges of oil-based ink.

The main grade is NO.5500 ST RED. Please feel free to contact us if you have any requests.

  • Other polymer materials
  • Ink/Toner

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Processing carbon black for oil-based liquid inks

Achieving ultimate jet black, mastering static electricity. The next generation of processed carbon black.

The main grade is NO.9945 BLACK. Please feel free to contact us if you have any requests.

  • Other polymer materials
  • Ink/Toner

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CARMINE 6B Powder for Oily Liquid Ink

Rich and vivid. Mastering oil-based liquid red pigments.

The main grade is NO.752 CARMINE 6B TONER. We can make fine adjustments as needed. Please feel free to contact us with any requests.

  • Other polymer materials
  • Ink/Toner

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Universal LAKE RED C Powder

It is a pigment that, despite its low durability, is inexpensive and has high concentration and high dispersibility.

NO.4010 LAKE RED C NO.4040 LAKE RED C

  • Other polymer materials
  • Ink/Toner

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[High Clarity / High Concentration] Various Dyed Rake Pigments (Pink, Purple, Blue, Black)

We offer a variety of traditional high-color and high-concentration dyed rake pigments in various colors.

NO.20 FANAL BLUE (PIGMENT BLUE 1) NO.101 NEO VIOLET LAKE (PIGMENT VIOLET 3) NO.409 NEO FANAL BOTAN (PIGMENT VIOLET 1) NO.9310 PINK (PIGMENT RED 81:4) NO.9945 BLACK (PIGMENT BLACK 7+α)

  • Other polymer materials
  • Ink/Toner

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CARMINE 6B for resin coloring

It is a low-tolerance, inexpensive, high-concentration high-performance pigment.

NO.654M CARMINE 6B TONER (Color Material PL Registration Number: 2-31 Red 192) NO.6232 CARMINE 6B (Color Material PL Registration Number: 2-31 Red 462)

  • Other polymer materials
  • Ink/Toner

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CARMINE 6B Powder for UV Ink

Our company specializes in CARMINE 6B. We can also provide detailed customization such as hue, surface treatment, and ink property control!

Representative grade for yellow hue: NO.6516 CARMINE 6B Representative grade for blue hue: NO.7003 CARMINE 6B

  • Other polymer materials
  • Ink/Toner

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Organic pigments (soluble azo pigments) for various inks

We contribute to the coloring of various ink products.

In the ink industry, vibrant color development and high transparency are required. Particularly in printing inks and inkjet inks, color reproduction and ink stability are crucial. Improper use of pigments can lead to poor color development and ink issues. Our organic pigments (soluble azo pigments) are vivid, highly transparent, and ideal for coloring agents in inks. 【Application Scenes】 - Printing inks (offset inks, gravure inks, and various other inks) - Inkjet inks - Writing instruments 【Effects of Implementation】 - Vivid color development - High transparency - Improved stability of ink properties

  • paint

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Trade Department (UV Sensitizers)

Manufacturing energy-efficient and clean products! In the field of surface processing such as UV inks and UV coatings.

Our trading department mainly handles UV photoinitiators. The main photoinitiator in UV systems provides the final product with the characteristic of quick drying, and environmentally, it generates low VOC emissions, enabling the production of energy-efficient and clean products. Additionally, by promoting the sale of UV photoinitiators and contributing to the spread of UV curing inks, we are helping to reduce environmental impact through energy conservation, decrease greenhouse gas emissions, and improve labor conditions by reducing VOCs. [Applications] ■ UV inks ■ UV coatings ■ Resists, etc. *For more details, please download the PDF or feel free to contact us.

  • paint

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Pigment Division (Pigments for Printing Inks)

Our strength lies in our unique technology that controls particles to match customer requirements, enhancing transparency, clarity, and dispersibility.

We would like to introduce the azo pigments and dye-based lake pigments manufactured by our company. The soluble azo pigment Brilliant Carmine 6B is our flagship product. Although it has weak resistance to various factors, it is a vivid red pigment with strong coloring power and high transparency. Additionally, organic pigments are often used primarily for printing inks, and Brilliant Carmine 6B is used as the magenta pigment in color printing represented by cyan, magenta, and yellow. 【Product Lineup (Excerpt)】 ■ Soluble Azo Pigments - Brilliant Carmine 6B - Lake Red C - Permanent Red 2B (Watching Red) ■ Dye-based Lake Pigments - PINK - BLUE - VIOLET - BLACK *For more details, please download the PDF or feel free to contact us.

  • paint

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UV photosensitizer (photopolymerization initiator)

UV photoinitiators used in the surface processing field such as UV inks, UV coatings, and resists.

Our company handles "UV photoinitiators" in the trade department. We mainly deal with fine chemicals such as photopolymerization initiators, various monomers, dyes, and pigment intermediates. The primary photoinitiator, which is a UV photoinitiator, imparts the characteristic of quick-drying to the final product. Additionally, from an environmental perspective, it generates low VOC emissions and allows for the production of energy-efficient and clean products. Please feel free to contact us if you have any inquiries. 【Chemicals Handled】 ■ Benzophenone-based photopolymerization initiators ■ Alkylphenone-based photopolymerization initiators ■ Thioxanthone-based photopolymerization initiators ■ Acylphosphine oxide-based photopolymerization initiators ■ Photopolymerization sensitizers / photopolymerization accelerators, etc. *For more details, please download the PDF or feel free to contact us.

  • paint
  • Ink/Toner

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Organic pigments (soluble azo pigments)

We handle various products related to colors, such as organic pigments and pigment processing products.

Organic pigments are primarily used for printing inks, and our company manufactures azo pigments and dyeing rake pigments. Among them, the soluble azo pigment "Brilliant Carmine 6B" is our flagship product. It has weak resistance to various factors but possesses strong coloring power, clarity, and high transparency. We leverage our unique technology to control particle size, enhancing transparency, clarity, and dispersibility. [Applications] ■ Printing inks / Toners / Coatings / Plastics / Cosmetics / Rubber / Inkjet / Dyeing / Writing instruments *For more details, please download the PDF or feel free to contact us.

  • paint

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