[Processing Technology] Black Dyeing

We accept black dyeing processing for a wide variety of products, ranging from large sizes over 2000mm to very small items!

"Black dyeing" is a treatment that finishes the surface of steel with a black glossy appearance, using a chemical method that involves immersion in an aqueous solution primarily composed of caustic soda. The composition of the film is Fe3O4 (magnetite). Because it originates from a chemical reaction on the surface, the thickness is usually 1 to 2 micrometers (which may vary slightly depending on the treatment time), and it has little impact on the product dimensions, making it suitable for coloring and rust prevention of precision parts. We accommodate a wide variety of products and achieve high quality through years of experience and unique formulation techniques. 【Features】 ■ The metal surface turns black as is, resulting in extremely small dimensional changes. ■ Applicable to most materials such as general iron, steel, and cast iron (excluding aluminum and stainless steel). - Some materials, cast iron, and hardened items may turn slightly reddish-black. ■ Enhances the added value of products with a beautiful black glossy finish. ■ Can respond at low cost and with short delivery times (possible same-day delivery at the earliest). *For more details, please refer to the PDF document or feel free to contact us.

Processing Technology