Summer is coming, and many friends have dug out the T-shirts that have been stored at home for a long time. The short-sleeved T-shirts that have been “refrigerated” for a winter, some are already wrinkled, and some are yellowed and faded. It really affects the wearing experience in the new year, so why do T-shirts fade?
There are many reasons why T-shirts fade. First of all, most reactive dyes contain sulfonic acid groups and other hydrophilic dyes. Sexual genes, if the dyes on textiles are not fully washed, there will be more unfixed dyes on the fibers, so dyes with high water solubility will fade and stain the friction fabrics, and some highly direct dyes will It is difficult for dyes to diffuse into the fiber, causing the surface of the textile to float and fade easily.
Secondly, the structures of various fabric fibers are different, and the fixation rates of dyes are different. If the fixation rate is high, the hydrolyzed dye is less, and the floating color is easy to wash off, the color fastness to rubbing will be good. Similarly, if the fiber surface is smooth, the structure is flat, and the friction coefficient is low, the color fastness to rubbing will be good.
Then there are different forms of dyes existing on fibers. Generally, the states of dyes existing on fibers are mainly molecular forms, aggregated forms and a mixture of these two forms. Among them, dyes that exist in the form of molecules fade faster, while dye aggregates are more prone to energy transfer due to strong internal forces within the molecules, and light fading generally occurs on the surface, so dyed fabrics fade faster in the initial stage and will directly Basically unchanged.
Finally, light is the main factor causing dye fading. Under the irradiation of ultraviolet and visible light, the chromophoric group of the dye undergoes photooxidation reaction or photoreduction reaction, causing the fabric to fade.
What should I do if my clothes fade?
1. Salt water soaking method
Newly bought clothes should not be mixed with other clothes when washing them for the first time. First put a little salt in a separate basin, then put in warm water, soak for about half an hour to an hour, and then wash again Just clean it as usual.
2. Clothes drying method in reverse direction
Generally, direct sunlight will cause clothes to fade. In order to avoid clothes being exposed to direct sunlight, many people will dry clothes in reverse direction, which is especially suitable for dark clothes. Colored clothes can reduce the possibility of fading caused by front-side drying of clothes, and reverse-drying can also make the color of clothes last longer.
Relatively speaking, natural fiber fabrics are easier to fade than chemical fiber fabrics. Good clothes on the market usually choose natural fibers. For the fabrics made, dyes with natural ingredients that are harmless to the human body will also be used for coloring. Although these dyes have low color fastness, they are harmless to the human body.
In addition to the above natural and healthy properties, hemp T-shirts can also be antibacterial, deodorize sweat, and have strong moisture absorption and breathability. They are especially suitable for hot and sweaty summers. Of course, to address the problem of fading of natural fiber fabrics, You can choose light-colored hemp fabric.
