Leather Dyes Specialized Manufacturer
Ltd. is an acid dyes, direct dyes, leather dyes, feed additives and other chemical raw materials manufacturers, products are mainly used in leather, wool, tweed, silk, paper, wood, metal and other industry sectors.
Do you all understand the classification of leather dyes?
Do you understand the classification of leather dyes?
1. Economical leather dyes
Currently, the acid dyes and direct dyes on the domestic market are all bright-colored monoazo dyes, but the dyeing fastness of leather is relatively poor, and the price is low. The so-called acid black and direct black in the leather dye market are all economical leather dyes.
2. Acid dyes
Acid dyes are anionic dyes that color leather fibers in an acidic bath. According to their dyeing performance and usage methods, there are strong acid dyes and weak acid dyes. Strong acid dyes have a simple structure, small organic molecular structure, and a high proportion of sulfonic acid groups. For example: weak acid orange GN; weak acid brilliant red B; weak acid yellow 49; weak acid black 210#; weak acid black 242#; weak acid black 168# etc. Brown varieties include: weak acid brown 75#; weak acid brown 348#; weak acid brown 349# etc. The dyes exist in ionic form during dyeing, and require good coloring in strong acidic media, thus they can be used for dyeing leather fibers.
Properties of acid dyes:
Acid dyes contain sulfonic acid groups (-SO3H), and a few contain carboxylic acid groups (-COOH). Their commercial form is sodium salt, so they have good solubility in water and can also dissolve in alcohol.
Acid dyes will change color and luster when in contact with metal ions such as calcium, magnesium, lead, copper, and iron.
Washable; the indicators for dry and wet rubbing resistance are relatively low. The production process is simple, the price is not high, the dyeing is very bright, the color spectrum is complete, and the dyeing fastness is high, with general sunlight fastness being 5-6. It is a major variety in the high-end leather dye market both domestically and internationally.
3. Direct dyes
Direct dyes do not require the help of mordants when dyeing cotton, linen, and viscose cellulose fibers. Some varieties of direct dyes can be used directly for leather dyeing in acidic media. Direct dyes have a large molecular weight and slow penetration. Compared to monoazo acid dyes, the production process is more complex, the product price is low, and the wet fastness, wash resistance, light resistance, and wet rubbing resistance indicators for dyeing leather fibers are not ideal, making them products facing elimination in the leather dye market.
4.High-end environmentally friendly leather dyes
They have the advantages of bright leather dyeing, fast penetration, light resistance, wash resistance, and migration resistance. They do not contain aromatic amines and heavy metals, making them green and environmentally friendly. They are major products in the domestic and international leather dye market.
Latest developments
Dezhou Jinmao Chemical Co., Ltd.
Address: 1922 Yingbin Street, Lingcheng District, Dezhou City, Shandong Province, China
WhatsApp:
Focus on GLIDE