The small particles bind towards the fatty/oily elements with the fingerprint residues as a result of addition of the surfactant; This is certainly only feasible because of the relative stability of such parts preserved with time. Therefore, aged fingerprints is usually designed by using the small particle reagent approach. In https://www.tumblr.com/business-sites/749272769121910784/imr-green-smokeless-gun-powder?source=share