Will60gSilicone rubber and60gThe curing agent is enclosed in two casings. Press both1:1The proportions are evenly mixed. Smear the bump marks on, about15About minutes silicone rubber can cure, gently remove the silicone rubber can be obtained trace model. The model is elastic and not easy to break, and can reflect the subtle characteristics of the traces. For extracting tool traces, handprints on bumpy surfaces made by fingerprint powder brush.