Ammonium Hydroxide + H₂O₂
material specific
Composition
50ml NH₄OH, 50ml H₂O₂ (3%)
50:50
Method
immersion
Time
20s
Basic Information
Category:Material Specific
Composition:50ml NH₄OH, 50ml H₂O₂ (3%)
Concentration:50:50
Reveals:Grain boundaries, twin boundaries
Typical Results:Standard etchant for copper and brass. Reveals grain boundaries and annealing twins. Fresh solution required for best results.
Color Effects:Grain boundaries dark, twins visible