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A tool mark in a door frame contains small particles; The best way to collect them while leaving them in context is by making a cast. A tool mark is any impression, scratch, or abrasion made when contact occurs between a tool and an object. Abrasion marks are the tool marks made when surfaces slide across one another; objects such as pliers, knives, axes, or a gun barrel make this type of mark. There are three types of tool mark impressions; namely; indentation, abrasion, and cutting marks.

The best way to collect them while leaving them in context  is by making a cast.

What is a Tool mark?

This can de defined as an impression, marks or scratch made when contact occurs between a tool and an object.

The best method in the collection of the small particles which are present as a result of the abrasion between the tool and object is by making a cast which doesn't alter the doorframe.

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