Main description (English)

Optimization of the factory recipe for dyeing acrylic fibers in laboratory conditions was done in this article. The basic color The dye Basic Red 46 was used for dyeing, while uncolored acrylic fabric in plain weave was used as the substrate. The optimized recipe for dyeing acrylic fibers with a basic dye is partly different from the recommended factory recipe. More efficient dyeing through optimization means more dye on the fiber and less waste dye remaining in the bath after dyeing, which certainly facilitates the purification of liquid waste. Dyeing in laboratory conditions has its specificities, but it is a good basis for the formation of dyeing parameters in industrial conditions. Relatively smaller differences for numerous values of the parameter K/S, for individual parameters in the recipe, may lead to thinking about a compromise for the selection of operating parameters. Optimized and factory recipes are not universal and are not always valid, on the contrary, the changing chemical nature of acrylic fibers and dyes will affect the choice of working dyeing parameters, which constantly requires new analysis and laboratory testing, as a prerequisite for industrial dyeing. Key-words: acrylic fiber, dyeing, Basic Red 46, optimization.