Investigating the Factors Affecting the Color Change of Wool Fibers Used in Handmade Carpets

Wool is one of the most important and widely used fibers in handmade carpets due to its unique properties. However, due to the variety and spatial diversity of wool sources, the quality and physical properties of fibers such as length, fineness, strength, etc., as well as the appearance of wool such as color, luster, and so on are strongly influenced by many factors, i.e., geographical area, breed of sheep, area of sheep's body and so on. The color difference of apparently white wool fibers and especially the variety of its tint attributes will affect the final color appearance of wool yarns and the procedure of raw wool fibers treatments such as washing, bleaching, and dyeing. The present study addresses the various types of tint attributes of apparently white wool fibers. Besides, the research has been conducted to investigate the color appearance properties of wool fibers used in producing handmade carpets, the possibility of their bleaching and its effect on the final dyeing operation, and wool yarns' color absorption reviewed in the current paper.