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To fulfill the diversified needs of our clients, we are involved in offering an excellent quality gamut of Paper Dyes. Owing to its optimum purity and long shelf life, our range of dyes finds its immense application in paper industry. Our team of dexterous professionals uses the best grade basic chemical substances and advanced methodologies to formulate these dyes in accordance with the defined industry standards. Clients can avail the offered Paper Dyes in a variety of grades and packaging options from us as per their specifications.
Papermakers over the time use Paper Dyes tremendously in the paper industry. Seeing the growth of dyes in paper industry, it is predicted that in near future, paper industry will see more varieties and grades of papers that now being treated with paper dyes.
The most commonly dyes are sulphur dyes and cationic direct dyes in the paper industry. Acid and basic dyes are also used in paper industry. There are different kinds of paper dyes with different properties like sulphur dyes are reduced alkaline solutions with color black, a polymer is found after a reaction between 2, 4 dinitrophenol and sodium polysulphide.
Some of the features of direct dyes are, these have long conjugation with a planar molecular structure. These are cationic ionic dyes with positive charge over the surface groups.
Selection of dyes
To give a stable paper, the dye selected must give:
Show light fastness
Show bleed fastness
Provides stability to temperature and humidity
Low or no metameric
Compliant with regulations in force
Safety in Handling
Does not affect any other paper chemical/process or parameters
Modern Approach in Paper Dyeing
Paper dyeing mechanism has greatly evolved in the last couple of decades. There are new trends emerging in the industry with more sophistication and usability of high speed machines. The new approach is to minimize the use of traditional basic dyes and utilization of large number of specialty modified basic and direct dyes. The coloration techniques have also changed. Now the coloration is done by environment friendly methods.
The new trend of continuous dyeing/size press dyeing has also emerged with new opportunities in various other ancillary segments such as carbonless papers/thermal papers are coming up/
Eco-Friendly Paper Dyes
It is important to turn towards eco-friendly dyes because of rising environmental concerns.
Amines should be minimum in the dyes to keep it eco-friendly.
Dyes should be free from heavy metals.
Certification from ETAD (Ecological and Toxicological Association of Dyestuff)
Using of biodegradable dyes.