Trace safeguard trace is used visible to make by finger marks on smooth surfaces (like for example glass, plastic etc.). This can be simple for example coal dust, iron splinters, graphite, ferric oxide or a commercial propellant. Also different fat castings like for example of the forehead or an ear can be made so visible. On the basis these castings one cannot identify the author clearly, but the act course of events thus can be reconstructed and be looked for places for further traces.