Sodium Hydroxide 1lb.

For Brown To Black

(Semi-opaque finish; Hot or cold process):

• Antimony Sulfide (2 parts/weight)
• Sodium Hydroxide or Caustic Soda - lye (4 parts/weight)
• Clean, potable water (256 parts/weight)
  Note: Works well on 85/3/5 bronze but turns black on silica bronze.