What is the color fastness of fabrics?

Color fastness (Color fastness) is also called color fastness, dye fastness. It refers to the resistance of the color of textiles to various effects during processing and use. The fastness grade is evaluated according to the discoloration of the sample and the staining of the undyed lining fabric.

During its use, textiles will be exposed to various external effects such as light, washing, ironing, perspiration, friction and chemical agents. Some printed and dyed textiles are also subjected to special finishing processes, such as resin finishing, flame retardant finishing, sand washing, and grinding. This requires that the color of printed and dyed textiles relatively maintain a certain fastness.

Factors affecting color fastness:

The so-called color fastness (referred to as color fastness) means that the dyed fabric is subjected to external factors (extrusion, friction, washing, rain, exposure, light, sea water immersion, saliva immersion, water stains, sweat stains) during use or processing. Etc.) The degree of fade under the action is an important indicator of the fabric. The most commonly used items are washing resistance, light resistance, friction resistance, perspiration resistance, ironing resistance, and weather resistance.

In actual work, the test items are mainly determined according to the end use of the product and product standards. For example, the wool textile product standard stipulates that the color fastness to sunlight must be tested. Of course, the perspiration fastness of knitted underwear must be tested, while the outdoor textiles (Such as parasols, light box cloth, canopy materials), of course, the color fastness to weather resistance must be tested.

Including: color fastness to soaping (sample), color fastness to rubbing, color fastness to chlorine water, color fastness to non-chlorine bleaching, color fastness to dry cleaning, color fastness to actual washing (clothing, fabric), perspiration resistance Color fastness, color fastness to water, color fastness to light, color fastness to sea water, color fastness to saliva.