亚洲狠狠婷婷综合久久白云,国产私人尤物无码不卡,天堂网www天堂资源网,日本无遮挡拍拍拍免费观看,欧美国产日韩久久MV,2020国产精品极品色在线,国产99九九久久无码熟妇,首页中文字幕中文字幕

Acid dyes are a class of water-soluble dyes with acidic groups on the structure, which are usually dyed and printed under acidic conditions when applied. There are many varieties of acid dyes, complete chromatography, simple dyeing process, bright color, widely used in wool, silk, nylon and its mixed textile. It is also suitable for Leather, ink, paper, wood and other industries.

Commonly used acid dye process:

1. Strong acid dyes

Dye x%.

Sodium Sulphate Anhydrous 5-15%.

Sulfuric acid 1-3%.

2. Weakly acidic dyes

Dye x%.

Acidic leveling agent 0.5-3%.

Ammonium sulfate 2-5% (light, medium).

Glacial acetic acid 0.5-3% (dark).

Fixing agent 3-6%.