Effect of chitosan on dyeing of chemical fibres

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.