Beraha's Etchant
Beraha's Reagent
Material Specific
Composition
20g Na₂S₂O₅, 100ml H₂O, 1g K₂S₂O₅
Mixed
Method
Immersion
Time
60s
Alternative Names
Tags
Reveals
Phases, grain boundaries
Typical Results
Color etchant for stainless steels. Produces colored phases.
Color Effects
Colored phases
Compatible Materials
Incompatible Materials
Application Method
Method:immersion
Typical Time:60 seconds
Preparation Notes
Dissolve 20g Na₂S₂O₅ and 1g K₂S₂O₅ in 100ml water.
Application Notes
Immerse sample for 60-120 seconds. Rinse with water.
Troubleshooting
Produces color contrast between phases.
Storage Notes
Store in glass bottle. Shelf life: several weeks.
Alternative Etchants
- Klemm's Reagent
- Weck's Etch
Similar Etchants
- Klemm's Reagent