We provide different kinds of liquid dyes for various application.
Water-based complexing dye is one kind of environment-friendly metal complex dyes, which are modified on the basis of oil-soluble metal complex dyes; this, it is a kind of leading products on the market currently. While maintaining the excellent performances of original products, it is miscible with water unlimitedly; its solution is crystal clear without turbidity and sedimentation; it has bright colors, and excellent compatibility with ethanol and other solvents .
Liquid metal complex dyes
Wood Applications
Wood coloring treatment process
1) Preparation of Wood: Sunway liquid dye 1-10%, solvent 30% -40%, 40-60% resin, additives 0-5%
2) coating: primer treatment, which already contains a colorant
3) worn cilia: After coating under the paint dry, use sandpaper to make wood surfaces substantially flat
4) coating: painted primer, paint thickness increase
5) Polishing: After the coating paint dry, use sandpaper (# 200-400) abrasive surface so smooth wood surfaces
6) painted: painting of the final project, the choice of a suitable transparent topcoat, slightly lower than the viscosity of the primer
7) Drying: the wood after the coloring treatment in a ventilated, dry place to dry naturally
The requirement for dyes in paper making is not only related to chemical structure, but also depends on the application of the paper. The common dyes can be used for dyeing package paper, for that the requirement for light resistance is relatively low. But some special paper that has high light resistance needs pigment for dyeing, like top grade writing paper, sanitary paper, decorative base paper.
Substantivity to cellulose of liquid paper dye is higher than other kinds of dyes. Direct dyes have high molecular weight, linetype molecular structure, good symmetry, long conjugated system, good coplanarity, and great Van der Waals force between dyes and fibre molecule. In addition, molecule of direct dyes has perssads like amino, hydroxy, azo, which can form hydrogen bond with hydroxyl and amino of cellulose fibre and protein fibre, in order to improve the substantivity of the dyes.
When dyeing cellulosic fibre by liquid paper dye, salt plays accelerating role. The acceleration method is that direct dyes dissociate to pigment anion in solution. Cellulose fibre bears a negative charge, the dyes and cellulose has charge repulsion, which can be reduced by adding salt to dye liquor. For salt-effect direct dye that has much sulfony, the acceleration function of salt is remarkable. The salt must be added in batches to guarantee the dyeing evennes. There is more need for salt to direct dyes with low dye update, the dosage depends on the dyeing type and depth. For those needs high dyeing evenness, the usage of salt should be reduced to avoid color uneven and other dyeing defect.
