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Colour Fastness to dyeing textiles

Color fastness is that the ability to keep original dye color under the influence of other kinds of external factors in the use processes of dyeing textiles. Or we can define color fastness like this: Color fastness refers to the resistance of color to fade or bleed of a dyed or printed textile materials to various types of influences e.g. water, light, rubbing, washing, perspiration etc. It is an important indicator to measure the quality of dyeing products.


Due to the use of chemicals in the late processes of dyeing and finishing, like acid, alkali, oxidants, reductants, etc., and when using in washing, sunlight, rubbing, sweat, high temperature and so on, dyeing textiles may fade or discolor. Therefore, dye color fastness is diverse, including washing fastness, light fastness, rubbing fastness, perspiration fastness, chlorine fastness, ironing fastness, etc.

The color fastness requirement of textiles is different because of their different use and process. For example, the curtain which is less washed requires low colorfastness, but due to exposure to the sun for a long time, it needs high lightfastness. Summer clothing fabrics should have higher light fastness, washing fastness and perspiration fastness for the reason that they always expose to sun and human body always sweat.


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