After the zipper is waterproofed, the paraffin will be transferred to the fiber. How should the metal zipper be prevented from discoloring? The wax is covered on the metal zipper teeth so that it can slide smoothly. When a metal zipper is sewn on a tape that has been treated with water resistance, the paraffin will melt during the ironing process and become cloth, causing the tape to be contaminated. In this case: When ironing, insert some paper or fabric between the fabric and the zipper for ironing

 

  The discoloration and discoloration of cotton fabrics caused by reactive pigments, how should the metal zipper be prevented from discoloring? The pigments in the dyed cotton fabrics will react with metal ions. Under humid conditions, pigments react with copper alloys to produce discoloration. After re-dyeing the garment, fully dry and keep the finished product in a dry place.