The difference between color fastness, dyeing fastness and color staining fastness

Color fastness

Color fastness is also known as dyeing fastness, dyeing fastness. It refers to the resistance of the color of textiles to various effects during processing and use.

The fastness level is evaluated according to the discoloration of the specimen and the staining of the undyed lining fabric. Textile color fastness test is a regular test item in the textile inherent quality test.

Textiles in the process of its use will be subject to light, washing, ironing, sweat, friction and chemicals and other external effects, some printed and dyed textiles also undergo special finishing processes, such as resin finishing, flame retardant finishing, sand washing, brushing, etc., which requires the color of printed and dyed textiles to maintain a certain degree of relative fastness.

Dyeing fastness

Dyeing fastness referred to as color fastness; colored fibers, fabrics or other coloring matter color, in the processing and use of various effects of sunlight, washing, friction, sweat stains and other resistance.

Color fastness rating, in addition to the old sunlight resistance fastness for R level, the other are 5 levels. The higher the grade, the better the color fastness. Leather measurement methods are fading (leather itself color change) and staining l on contact with the staining of two kinds.

Fade test is the leather specimen according to the prescribed conditions after processing, the specimen and untreated test sample uu between the color difference, with the standard gray sample card to compare the grade. The staining test is the test sample and the standard white cloth according to the specified conditions by touch, white cloth by the test sample color transfer put the degree of staining to determine the gray staining sample card to measure the level.

Color staining fastness

The migration of dyestuff from one area to another, usually from dark to light colored parts, sometimes occurs during storage of garments composed of different colored parts, a phenomenon different from sublimation because it takes place at temperatures lower than sublimation, and it also occurs with non-sublimated dyestuffs. It is mainly reflected in the migration of polyester and other chemical fiber fabrics, but also other raw materials.

Color transfer is mainly due to two reasons: First, the dyestuff has been transferred, especially the disperse, reactive dyestuff floating colors and dyestuff migrating free within the fiber, which may be dyed on the fiber on the surface of another sample; especially the dark color on the light color, thus remaining on the surface of another sample in granular, embossed form. Secondly, the fibers are dislodged by frictional forces and transferred from one sample to the top of another.