Below are common forensic investigation etchants for serial number restoration of firearms. They are known to produce good contrast for mark recovery. However, it could take more than an hour to get a readable result. They will NOT work on car parts. These are professional products for police departments or forensic labs. No instructions will be provided.
Macro Fry’s Reagent
- This is the standard reagent for forensic studies, stronger than our regular Fry’s reagent for metallography.
ASTM 36 Ferric Chloride Etch
- An alternative to Macro Fry’s.