Pigments for printing continue to excel in the field of colorants due to ease of application on various substrates, meet the demands of fastness properties, regulatory impact/compliance etc and make inroads into new applications like inkjet printing. Colour components in the past were known as pigment emulsions owing to the medium of kerosene emulsion thickening used and later they became pigment dispersions, which transpire now as pigmented or digital inks for textiles abroad.
Understanding the basic concepts provide clarity of the subject and dispel misconceptions thereby forming a sound base for emerging technologies effecting value addition to the downstream users. Thus, it is worthwhile to cover pigment printing system in the curriculum of the educational institutions for virtual learning.
Pigment printing constitutes about 50% share and therefore it is appropriate for an exclusive presentation on this theme to enable users recapitulate the various components used, like color pigment dispersions, binders, fixers, thickeners, rheology modifiers, auxiliaries (emulsifiers and softeners) and their functions.
The author is Technical Consultant at Pidilite Industries Limited