What kinds of chemicals can be softened after the gold jewelry is burned by gas and fire can make it hardened 4 Comments / By huanggs
Archie September 12, 2022 at 8:57 pm Gold first adds hard gold powder. After the jewelery is burned with air fire, as long as the light, light, and polishing can make gold hard. Log in to Reply
Myra September 12, 2022 at 8:57 pm There are some effects in freezing, but generally not adopted, it will naturally harden up for a while Log in to Reply
Gold first adds hard gold powder. After the jewelery is burned with air fire, as long as the light, light, and polishing can make gold hard.
There are some effects in freezing, but generally not adopted, it will naturally harden up for a while
Put in cold water.
cool down