Color fastness, also known as color fastness, color fastness. Refers to the resistance of the color of textiles to various effects during processing and use.
The fastness rating is based on the discoloration of the sample and the staining of the undyed backing fabric. Textile color fastness testing is a routine testing item in the intrinsic quality testing of textiles.
Textiles will be subjected to various external effects such as light, washing, ironing, perspiration, friction and chemicals during their use. Some printed and dyed textiles are also subjected to special finishing processes, such as resin finishing, flame retardant finishing, sand washing, grinding. wool, etc., which requires the color and luster of printed and dyed textiles to maintain a certain fastness.
Color fastness is referred to as color fastness; the color of colored fibers, fabrics or other coloring matters is subject to the resistance to various corrosion effects such as sunlight, washing, friction, and perspiration during processing and use.
For the rating of color abundance, except for the fastness to light, which is R-level, the others are 5-level. The higher the grade, the better the color fastness. There are two kinds of leather measurement methods: fading (the color change of the leather itself) and staining l contamination of the contact.
The fading test is the color difference between the leather sample and the untreated test sample after the leather sample is treated according to the specified conditions, and is compared and graded with a standard gray sample card. The staining test is to touch the sample with the standard white cloth according to the specified conditions, and the degree of color transfer and staining of the white cloth by the sample is determined.
Garments composed of different colored parts sometimes migrate from one area to another during storage, usually from dark parts to light parts. This phenomenon is different from sublimation because it is at low It is carried out at sublimation temperature, and this phenomenon also occurs with non-sublimation dyes. It is mainly reflected in the migration of chemical fiber fabrics such as polyester, as well as other raw materials.
Color transfer is mainly due to two reasons: First, the transfer of dyes, especially the floating color of dispersed and reactive dyes and the dyes released from the migration in fibers, may dye the fibers on the surface of another sample; especially The dyeing of a dark color to a light color, thereby staying on the surface of another sample in a granular, embossed form. The second is that the fibers fell off under the action of friction and were transferred from one sample to another.