noun
gunshot residue detection test; chemical test for GSR
Technical term for a forensic chemical reaction used to detect gunpowder residue on a suspect's hands or clothing.
警察は容疑者の手に硝煙反応を調べた。
The police tested the suspect's hands for gunshot residue.
noun
gunpowder residue
Colloquial extension referring to the residue itself, often used in crime reporting or casual forensic contexts.
犯人の服から硝煙反応が出た。
Gunshot residue was detected on the suspect's clothes.