ELECTRONIC SURFACE TREATMENT MATERIAL SUPPLIER

Gold Stripper Procedure

1. Strip gold powder and gold

2. Adjust pH to 4 with sulfuric acid
3. Displace with zinc wire for 3–4 hours
4. Dissolve zinc wire (1 part sulfuric acid, 3 parts water) into powder
5. After it becomes powder, add an equal amount of water and filter
6. After filtering, put the powder and filter paper into a quartz beaker, add concentrated sulfuric acid and boil (about an hour, with ventilation)
7. When you see sponge gold, pour out the waste acid and rinse several times with clean water
8. Dry and smelt

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