Process for pad dyeing in constant color with mixtures of substantive reactive dyes on natural or modified textile containing hydroxyl groups uses laboratory dyeing equipment to determine correction factor for subsequent feed

摘要

Process for producing dyeing of constant color with mixtures of substantive reactive dyes on substrates of natural or modified fiber materials containing hydroxyl groups involves determining a correction factor for regulating the subsequent feed of the padding liquor in a laboratory dyeing, so that the initial concentration in the foulard chassis is maintained throughout dyeing. Independent claims are included for: (1) a color-constant dyeing obtained by this process; (2) laboratory equipment based on a two-roll laboratory foulard.