Summer is coming, and many friends have dug out the T-shirts that have been stored at home for a long time and have been “refrigerated” Some of the short-sleeved T-shirts in winter have become wrinkled, while others are yellowing and fading, which really affects the wearing experience in the new year. So why do T-shirts fade?

There are many reasons why T-shirts will fade. First of all, most reactive dyes contain If the dyes on textiles are not fully washed due to hydrophilic genes such as sulfonic acid groups, there will be more unfixed dyes on the fibers, so dyes with high water solubility will fade and stain the friction fabrics. However, some dyes with high substantivity are more difficult to diffuse into the fibers, causing floating colors on the surface of textiles and making them easy to fade.

Followed by 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 on the fiber. Generally, the dyes on the fiber The states of existence are mainly molecular forms, aggregated forms, and mixtures 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 that causes dyes to fade. The chromophoric group of the dye Under the irradiation of ultraviolet and visible light, photooxidation reaction or photoreduction reaction occurs, causing the fabric to fade.

What to do if clothes fade Woolen cloth?

1. Salt water soaking method

When washing newly bought clothes for the first time, do not mix them with other clothes. 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 as usual. Just the same.

2. Anti-drying method of clothes

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Generally, direct sunlight will cause clothes to fade. Many people want to avoid clothes being exposed to direct sunlight. When irradiated, the clothes will be dried in reverse, which is especially suitable for dark-colored clothes. This can reduce the possibility of fading caused by front-side drying of clothes. Reverse-drying can also make the color of clothes last longer.

relatively It is said that natural fiber fabrics are easier to fade than chemical fiber fabrics. Good clothes on the market usually choose fabrics made of natural fibers, and dyes with natural ingredients that are harmless to the human body are also used for coloring. Although these dyes are not color fast The concentration is low but harmless to the human body.

In addition to the above natural and healthy properties, hemp T-shirts are also antibacterial. It smells bad and has strong moisture absorption and breathability. It is especially suitable for hot and sweaty summers. Of course, to deal with the problem of fading of natural fiber fabrics, you can choose light-colored hemp fabrics.