The new design incorporates standard 'sticky-tab' carbon tape particle collection devices, which meet the requirements of most State Crime Labs that conduct SEM (Scanning electron microscope) testing for GSR.
The investigator first sticky-tab swabs the suspect according to approved techniques, places sticky tabs into an evidence envelope and seals envelope with evidence tape (all included) for delivery to evidence technician or forensic lab.
The investigator then dry-swabs the suspect with proprietary L.E.T. swab and supplies a chemical reagent. A blue reaction on the swab at the 5-minute interval indicates a presence of nitrocellulose. When that blue reaction appears in the form of small ""spots"" or ""specks"", it is considered highly probable that this suspect recently fired a weapon and warrants further investigation.
ISID-2 is a ""binary"" test kit: It contains everything needed to collect GSR evidence from your suspect both for the investigation (instant field results) and separately for the crime lab submission (evidentiary).