WebSPR is a well known and utilized technique to develop latent fingerprints on difficult surfaces such as wel, cold drink cans, dew covered automobiles and oily or textured surfaces. DOJE'S FORENSIC SUPPLIES Web5. Small Particle Reagent (SPR) It is highly unlikely to have a situation to have questioned documents (glossy) submerged in water. But if it does, the examiner can develop the fingerprint using small particle reagents (or dry them and …

Wet Print, small particle reagent - YouTube

Small particle reagent (SPR) is a suspension of powder in a detergent solution. SPR is available in two colors, black (art.no. B-86000, molybdenedisulfide powder) and white (art.no. B-86600, titaniumdioxide powder); as well in a UV fluorescent version (B-86200). The powder particles in the suspension adhere, just … See more Small particle reagent is useful on wet surfaces (if drying of the surface and application of powder is not possible or desired for any reason). Also on surfaces covered with a … See more In the spray application, the area where fingerprints are suspected is sprayed with working solution, using a spray unit, e.g. the one supplied with article B-86000. The nozzle of the spray unit is adjusted to give a cone-shaped jet. … See more Before lifting, the prints should be allowed to dry. Forced drying, e.g. with a blow dryer, should be done with great care. The molybdene disulfide powder from black SPR moves easily, so … See more The dish development method uses a container or dish with working solution in which the article, on which fingerprints are suspected, is submerged. The working solution for dish … See more WebSmall particle reagent (SPR) technique is an effective method to develop latent fingermarks on moist, non porous surfaces. The method is based on the adherence of fine parti-cles of treating solution to the oily or fatty components of latent fingermark … fl st fairgrounds

Development of Latent Fingermarks on Various Surfaces Using

WebSep 4, 2024 · The latent fingerprint may be found on items which have been accidentally or deliberately wetted. One of the most effective application techniques for developing latent prints on wet non-porous surfaces is small particle reagent (SPR). SPR based on zinc carbonate and mixed with natural dyes (curcumin and anthocyanin) and commercial … WebThe mean particle size of ZnO-SiO2 nanopowder calculated through TEM was 32.9 nm. The development of fingermarks was carried out by powder dusting and small particle reagent (SPR) methods. Powder dusting method was used for the development of latent fingermarks on various dry, nonporous, and semi-porous surfaces. The SPR method was … WebSMALL PARTICLE REAGENT (BLACK) SECTION 1- IDENTITY NAME Evident Crime Scene Products, Inc. ADDRESS 739 Brooks Mill Road, Union Hall, VA 24176 TELEPHONE 800-576-7606 FOR ADDITIONAL INFORMATION CONTACT: ... SPR(Black) SECTION 2- HAZARDOUS INGREDIENTS HAZARDOUS COMPONENT CAS# TLV PEL fls title