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Green deposit on brass zipper
We are garment makers. we use brass zipper on some of the items. recently we shipped a consignment of jackets with brass zipper and it took about a month to reach the customer. the customer complained the zipper had green and white deposits on the zipper. the garment is made from printed material. The garment gives off a smell that seems that there was some untreated ammonia left in the fabric process.
I am attaching photos of what was found. Please help if any way to simply clean off these deposits in a safe way? we tried a small experiment on one garment by dabbing the deposit with HCl and the deposit melted away. but this is not a safe method to use on 12000 pieces.
- Karachi, Sind, Pakistan
A. Don't use any acids; Good old Brasso [affil. link to info/product on Amazon] should do the needful to clean up and offer corrosion protection for some time.
Bengaluru, Karnataka, India
A. Try 2-5% ammonium citrate solution, ph must be 8,5- 9. Immerse(min.30sec.) in hot solution(80 C) and then rinse it very well(Try it on some test pieces)! Hope it helps and good luck!Goran Budija
- Zagreb, Croatia