(NH₄)₂S₂O₈
Ammonium Persulfate
Material Specific
Composition
10% (NH₄)₂S₂O₈ in H₂O
10%
Method
Immersion
Time
30s
Alternative Names
Tags
Reveals
Grain boundaries, twinning
Typical Results
Excellent for copper and brass. Reveals grain boundaries and annealing twins clearly.
Color Effects
Grain boundaries dark, twins visible
Compatible Materials
Incompatible Materials
Application Method
Method:immersion
Typical Time:30 seconds
Preparation Notes
Dissolve 10g (NH₄)₂S₂O₈ in 100ml distilled water. Prepare fresh solution.
Application Notes
Immerse sample for 30-60 seconds. Swab gently. Rinse with water.
Troubleshooting
Prepare fresh for best results. Solution decomposes over time.
Storage Notes
Store in dark bottle. Prepare fresh when needed. Shelf life: 1-2 days.
Alternative Etchants
- Ferric Chloride
- Potassium Dichromate
Similar Etchants
- Ferric Chloride