The Safariland Hard Evidence Liquid Glue is a liquid cyanoacrylate designed specifically for use in fingerprint development. Liquid glue is placed in a small metal container and placed on a hot plate with a source of humidity. The cyanoacrylate (CA) will vaporize into cyanoacrylate esters that will adhere to latent prints, making them a light, chalky white. The resultant latent prints can then be photographed or further processed with powder, dyes or stains. The glue should be refrigerated when not in use.