Expray is a unique, aerosol-based explosive detection system field test kit for the explosives detection and identification of the following explosive types: - Group A explosives (e.g. TNT, TNB, etc.), - Group B explosives (e.g. Semtex H, RDX, C4, etc.) and - compounds containing inorganic nitrates that are used in improvised explosives (e.g. ANFO). Expray is commonly used as a pre-blast explosives detectors, analytical detection system tool, post-blast explosives investigative tool, screen against potential terrorist explosive elements and as a technical evaluation test in soil remediation on hazardous material "clean-up" sites. When used as a post-blast explosives investigative tool, the product is field proven to speed up crucial explosive investigations. The level of sensitivity (20 nanograms) surpasses that of other currently available explosive detection products. The explosives testing process is fast and efficient. No glass ampoules, spatulas or waiting period required. Explosive detection results appear in seconds. No additional tools or other explosives detectors equipment required. The identification/detection process requires no special training and testing can be performed "on the spot". For both law enforcement and investigative personnel, Expray is a proven explosive detection devices for increasing the accuracy, efficiency and number of interdictions. For forensic and environmental laboratories, it has proven to reduce the number of samples submitted for testing, saving both time and money. Expray is sold in a kit configuration, which provides all three aerosol sprays, explosive testing collection papers, and an RDX-impregnated verification pad (verification pad is useful for ensuring that the spraycan still contains active reagents and for demonstrating how a positive reaction will appear) in a convenient plastic carry case.