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  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)
Organic

Organic pigments (Pigment division)

The word "pigment" is not often heard in our daily lives, but it can generally be said that what people perceive as color is mostly colored by either dyes or pigments. So, to put it simply, the difference between dyes and pigments is that pigments are colorants that do not dissolve in solvents, while dyes are colorants that do dissolve in solvents.

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.

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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.

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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

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