Acidic dyes have a sulfo group (-SO₃H) and carboxy group (-CO₂Dye with H) etc. It is so called because fibers such as wool, silk, nylon, and acrylic are dyed in an acid bath.

Yamada Chemical's acid dyes are mainly used for textiles such as nylon and wool, and the three primary colors of acid dyes are also used for nylon carpets.
The black metal-containing dye (Print Black S liquid 80%) developed by our company, which has a higher concentration than conventional products, has stable uniformity in the liquid and is highly evaluated by customers. ..