Walker test
Filter-paper transfer test for nitrites in propellant residue. The cloth is pressed against desensitised filter paper, sprayed with sulphanilic acid and alpha-naphthylamine, and orange-to-pink spots map the propellant pattern.
Filter-paper transfer test for nitrites in propellant residue. The cloth is pressed against desensitised filter paper, sprayed with sulphanilic acid and alpha-naphthylamine, and orange-to-pink spots map the propellant pattern.
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