As the clothing industry grows bigger and better, new techniques, new materials, washing process, as well as the post-treatment of ready-to-wear products also witnessed significant changes and diversification.
Unfortunately, the dye transfer of fabrics during the post-treatment or washing process may cause discoloration on the teeth and slider of metal zippers.
Worry not because there are several things you can do to address these problems so you can enjoy your garments to the fullest.
It is not a secret that copper alloy reacts with chemicals like alkali, acid, oxidizing agent, sulfide, and reducing agent that will lead to discoloration. There are chemical reactions that will occur easily between these chemicals or the residues left in the fabrics or those introduced during the washing process and the teeth’s metal parts, the slider, retaining box and pin, and top and bottom stops that will result to discoloration.
Such reactions will happen easily in the damp environment and high temperature. They will also occur easily when the products are packed in plastic bags right after the washing, sewing, and steam ironing, and kept for a long time inside the bags. Chemical reactions will also occur between the fabrics that involve the copper alloy and reactive dyes.
Discoloration in Cotton and Wool Products because of the Washing Process
There will also be discoloration if the zipper containing copper alloy is affixed to bleached wool fabrics.
The following are the three methods applied to wool bleaching:
- Processing with the use of reductive bleaching agent such as dithionite
- Processing with the use of oxidative bleaching agent such as hydrogen peroxide
- Application of chlorine treatment to the finished products’ shrink-proof processing
Chemical gases like chlorine are going to be introduced when the chemicals involved in the treatment methods mentioned above are not fully neutralized or cleansed. In addition, these chemicals are also going to react with the surface of the zipper in the damp environment.
Discoloration will take place with the slider, teeth, retaining box and pin, and top and bottom stops of the zipper containing copper alloy because of the gas volatilization and chemicals when the finished products are packed inside the bags right after ironing.
Here are a few tips you need to remember:
- Make sure that you fully cleanse and dry the fabrics.
- The chemicals used in the washing process must be completely neutralized and cleansed.
- Packing must never be done right after ironing.
Discoloration Because of Sulfide
Sulphur dyes are dyes dissolvable in sodium sulfide. These are mainly applied to dyeing of the cotton fiber as well as blended textiles of fiber and cotton at low cost. The sulphur black is the primary kind of sulphur dye that reacts with zipper teeth containing copper alloy in damp and high temperature environment that will lead to the formation of copper oxide and copper sulfide.
To prevent this from happening, pay attention to factors like the testing time, temperature, the dosage of chemical agents, and PH value. The clothing must be fully cleansed and dried right after the treatment. ZipperShipper.com’s metal zippers are some of the highest quality products that you can find in the market right now. However, please remember that they still need proper care and attention to prevent discolorations.