Color fastnes also known as dyeing fastness, dyeing fastness. Refers to the color of textiles in the processing and use of various roles in the resistance.
The fastness is assessed according to the discoloration of the specimen and the staining of the undyed adjacent fabric. The test of color fastness of textiles is a routine test item in the test of intrinsic quality of textiles.
In the process of its use, textiles are subjected to various external effects such as light, washing, ironing, perspiration, friction and chemicals. Some printed and dyed textiles are also subjected to special finishing, such as resin finishing, flame-retardant finishing, sanding, sanding, and so on, which requires printing and dyeing textiles to maintain a relative color fastness.
The color fastness of colored fibers, fabrics, or other coloring matter, in the process and use of sunlight, washing, friction, perspiration and other corrosion resistance.
The colour fastness is rated at level 5, with the exception of Grade R for light fastness. The higher the level, the better the colour fastness. Two methods for the determination of colour fastness are fading (change of colour in the leather itself) and staining of the contact substance.
The fading test is the color difference between the leather sample and the untreated sample after the sample is treated according to the prescribed conditions. The staining test is to touch the sample with the standard white cloth according to the specified conditions. The degree of the color transfer of the white cloth sample is determined.
Unlike sublimation, the migration of dyes from one area to another, usually from dark to light, sometimes occurs during storage in garments made up of different colored parts, because it is below the sublimation temperature, and non-sublimation dyes will occur. Mainly reflected in polyester and other chemical fiber fabric migration, other raw materials are also.
Color transfer is mainly due to two reasons: first, dye transfer, especially the dispersion, floating color of reactive dyes and Free Dye migration out of the fiber, may be on the surface of another sample of fiber dye; In particular, the dark to light dye, so as to granular, imprinting stuck on the surface of another sample. The other is that the fibers break off under the action of friction and are transferred from one sample to another.
Post time: May-26-2022