Looking upon the chronicle use of dyes, the paper and pulp industry seeks the most primitive position.
Dyestuff manufacturers offer a wide range of colorants with due innovation to serve quality products for their customers. Basic dyes find their prominent presence in paper dyeing processes. The paper dyeing industry put all their diligence of dyeing paper into the ultimate use of the paper.
Depending upon the consistency of the constituent used in dyestuff, paper is dyed bifurcation, as in powder as well as liquid form. The final abode of the paper decides their colorants. Manufacturers keep their scope of dyestuff nearly for all vivid uses such as cardboard, tissue paper, recycle paper, depending upon the requirement of its application.
Basic dyes enhance the brightness and add depth with contrasting shades. Conventional basic dyes are now overtaken by imploring direct dyes to blend with basic dyes. Basic dyes are also seen as progressive for the environment. Blending dyes with the right pigment saturates the brightness of paper and these are termed optical brighteners.
Basic paper dyes are ideally suited for tinting papers used in the writing industry but achieving brilliant shades of colour on cardboard. Packaging paper can also be done using basic dyes.
Within the paper and pulp industry, all sorts of paper are included. Besides the paper used in the printing and press industry, the other arenas where papers are used are in producing facial tissue papers, envelope grades, cover papers, corrugated cases, specialty papers et cetera.
Following are the required characteristics of paper dyes to stand out in the paper dyeing industry –
- Must possess affinity towards the selected paper.
- Should be fastened to light.
- Paper bleeding should be eliminated.
- Should withstand moisture and humidity.
- Temperature stability.
- Regulatory compliant.
- Optimum depth.
- Safe to handle.
Some classic examples of basic dyes for paper are crystal violet, toluidine blue, methylene blue, malachite green, etc.
The build-up material of paper that is cellulose typically consists of negatively charged cell walls, in contrast, basic dyes acquire positive charges, so when basic dyes are applied over the walls of cellulose the positive chromophores in basic dyes tend to stick to the cell wall making them positive stains.
Chromophores are the part of the molecule responsible for its colour which is present as a cation.
Reaching towards the concluding lines, in order to attain colour perfections in your products, it is intelligently important to source colorants from reputed manufacturers.