Preparation

• 1). Don safety gear. You must wear goggles and gloves to protect your eyes and skin from hot fumes and accidental splatter.
  
  
• 2). Create a cleaning solution by combining 15 milliliters of vinegar with 3 grams of sodium hydroxide in the 250 milliliter beaker. Stir using a glass-stirring rod.
  
  
• 3). Wash your silver piece in the cleaning solution. Rinse the silver piece with water and dry it with a towel. Rinse and dry the glass-stirring rod.
  
  
• 4). Create a sodium hydroxide solution by combining 200 milliliters of distilled water with 48 grams of sodium hydroxide in the 500-milliliter beaker. Stir the solution using the glass-stirring rod.
  
  
• 5). Boil the sodium hydroxide solution using the hot plate. Turn the hot plate's power off.
  
  

Fix

• 1). Place your silver item into the sodium hydroxide solution. Only the reddish section of the item must be submerged.
  
  
• 2). Disturb the zinc powder on the bottom of the beaker using the glass-stirring rod. Push the powder against the reddish spot on your silver piece with the rod until the copper alloy is completely covered by zinc.
  
  
• 3). Remove the silver piece from the beaker after three minutes. Inspect the area to ensure that the copper alloy has been entirely covered by the new layer of zinc.
  
  
• 4). Rinse the silver piece in distilled water to remove any excess zinc or sodium hydroxide. If you see any copper remaining, resubmerge the silver piece into the sodium hydroxide solution and reapply more zinc to the reddish location. Remove again after three minutes and rinse the silver piece in distilled water.