Yellowish Problem in denim jeans washing
Yellowing of garments become many reasons. The techniques need to prevent Yellowish Problem jeans washing.
Sometimes, fabric yellowing indicates fabric low quality so the fabric may fix this problem. Proper treatment of garments are the keys to minimizing losses from yellowing. The below discussion possibly come yellowish on garments.
Excessive heat creates yellowish problem in washing. Especially in the presence of high humidity, high exposure to ultraviolet light, or long term storage .
2. CHEMICAL ADDITIVES OR AUXILLARIES
Yellowish resists Optical brightening agents (OBAs) or fluorescent whitening agents. These unique chemicals have the ability to absorb invisible ultraviolet light and emit this light in the blue region.
One of the most common used in washing is chlorine. Sodium hypochlorite is one of the oldest and most commonly used garments bleaches. Chlorine in garments process waters has been called the “unseen assailant” and is a common source for fabric yellowing.
Chlorine attacks and yellows protein based fibers such as wool and silk. It also exhibits yellowing effects on nylon. Chlorine based chemical treatments can be beneficial on certain garments but applied selectively and carefully. Any residual chemicals left on these garments during heat setting also contribute to the yellowing potential.
The single biggest source of yellowing has been identified as oxides of nitrogen. The most prevalent pollutant, nitrogen dioxide, may react with small amounts of chemical residues, oils or greases on the fabric surface. High concentration of nitrogen dioxide has been shown to yellow all garments directly.
The contaminants often are contained in cardboard boxes or dividers, plastic sheets, films, or bags and in auxiliary materials such as pumice stones used for garment after-washing processes. In recent years this type of yellowing has been both frequent and also difficult to minimize.
5. CONSUMER CONTAMINANTS
Contaminants include perspiration, chemical residues from such products as perfumes, body lotions, make-up, medical ointments, effects of commercial and domestic laundry products on various textile materials
To avoid yellowish problem of a garment, the below techniques using
Should be garments slightly acid (pH 5.5 – 6)
Should be neutral properly after pp wash and Bleach wash. It is very important
Using softeners and optical whiteners that are resistant to yellowing
Avoid the accumulation of exhaust gases in the workplace and where garments are stored
Use plastic garment bags should be anti-phenolic antioxidants
Garment components should be anti phenolic compounds
Maintain good ventilation in storage areas, and processing facilities.
Use chemical finishing agents like antiozone softeners
Avoid exposure of white garments to direct sunlight.
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8) Hildebrand, A., “Yellowing in Storage,” IFI Bulletin, March 1996, No. 446.
9) Busler, C., “Stain Removal on Laundry Items – Part II,” IFI Bulletin, September 1996, No., 243.
10) Pannell, C., “Collar Problems,” IFI Bulletin, March 1996, No. 36.