The slipped impression occurs as the tool drags or slides across the surface. The resulting toolmark is a series of striations running parallel to each other following the direction of the drag. For example, such impressions are created by slipping a key across the door of a vehicle, by cutting with a knife (not used in a sawing motion) through a given material, or by cutting an electrical wire using a pair of lineman's pliers. The molded impressions are the result of the contact of a tool onto a surface with no lateral motion (no drag nor slip). The resulting toolmarks are a three-dimensional mold of the part of the tool that contacted the surface. Examples of such impressions are the leverage of a door from its frame with a pry bar, or the serial number stamped onto a fire-arm's barrel. Some toolmarks are made of a combination of molded and slipped
The slipped impression occurs as the tool drags or slides across the surface. The resulting toolmark is a series of striations running parallel to each other following the direction of the drag. For example, such impressions are created by slipping a key across the door of a vehicle, by cutting with a knife (not used in a sawing motion) through a given material, or by cutting an electrical wire using a pair of lineman's pliers. The molded impressions are the result of the contact of a tool onto a surface with no lateral motion (no drag nor slip). The resulting toolmarks are a three-dimensional mold of the part of the tool that contacted the surface. Examples of such impressions are the leverage of a door from its frame with a pry bar, or the serial number stamped onto a fire-arm's barrel. Some toolmarks are made of a combination of molded and slipped