Some regularities of the shaping of blood imprint depending on the type, duration of the contact and nature of the sign-forming surfaces

Examinations of blood traces belong to research of biological material evidences. The existing amount knowledge about the mechanism and morphology of blood trace impositions on material evidences doesnt meet actual demands of investigation. The authors have carried out experimental study of blood prints on various materials. The obtained results specified essential differences in the mechanism of formation and morphological signs of blood prints, depending on characteristics of item carrier of blood, perceiving surfaces and a kind of contact (blow, short or long pressure).