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The effect of structure and content of the main components of UV paints (disperse dyes and pigments, photoinitiators, oligomers, cross-linking agents) and some auxiliary substances on photosensitivity of paints and color fastness are studied. Optimization of the composition of UV paints containing disperse dyes offers smaller color variation in UV drying and provides high color fastness to wetting and rubbing. A disadvantage of UV paints based on disperse dyes, is the relatively low fastness to light, which may be overcome by substituting the latter by organic pigments. For more optimal correspondence to other modern technologies of pigment printing, the use of emulsion UV paints is suggested. Such paints provide materials with good hygroscopic properties, improved physicomechanical characteristics and high color fastness.

Treatment with chitosan before dyeing significantly improves the properties of fabrics made of polyester and polyamide fibres: it increases the intensity and fastness of the colors of the fabrics; the capillary and sorption properties of the fabrics are improved due to swelling of the chitosan film on the fibre; the mechanism of dyeing textile materials is significantly altered by not requiring penetration of the dye into the depth of the fabric.