Patent ID: 7807104

Claim:
A method of testing an object for explosives by determining whether a color appears indicating the presence of explosives, comprising the following steps in the following order: swiping the object with a sample pad, providing a first reagent for detecting explosives, delivering said first reagent to said sample pad, if color appears it indicates the presence of explosives, if no color appears the next step is performed, heating said sample pad, viewing said sample pad to observe any color change in said sample pad, if color appears it indicates the presence of explosives, if no color appears the next step is performed, providing a second reagent for detecting explosives, delivering said second reagent to said sample pad, if color appears it indicates the presence of explosives, if no color appears the next step is performed, heating said sample pad, and viewing said sample pad to observe any color change in said sample pad, if color appears it indicates the presence of explosives, if no color appears the test is negative for explosives.