In criminal investigation, one often comes across cases involving the passage of different types of bullets in objects made of or fitted with metallic sheets of varying thicknesses. In this paper, the authors have studied the interaction of 9mm bullets with iron sheets of varying thicknesses with gauge numbers varying from 30 to 14. The authors have observed that (i) the nose of the bullets becomes flattened, (ii) in sheet of gauge number 14 of thickness 2mm, the lead core and jacket may get separated, or the bullet may turn into a disc, (iii) the diameter of the bullet hole depends upon the energy lost by bullet and hence in some thicker sheets, the diameter of hole may become larger than the calibre of bullet, (iv) there is formation of plug which may also penetrate in human body, (v) there is formation of some tiny fragments of iron which may produce slight contusions on human body around the gunshot hole, (vi) the bullets do not lose appreciable weight while passing through sheet, (vii)striations on bullets that had passed through the sheets of gauge numbers 30 to 16 and on the jacket that had been separated from the core while passing through sheet of gauge number 14 are maintained, thereby, enabling the evidence bullets to be linked with a suspected firearm, and (viii) the bullets are lethal even after their passage through sheets.
The union fabrics were made from eri with cotton and eri with polyester. The 2/60s eri silk yarn was used as warp and 2/40s cotton and polyester yarns were used as weft to construct the eri union fabrics using three different weaves namely plain, twill and satin. The prepared eri x cotton and eri x polyester union fabrics and also the pure eri x eri fabrics were tested for different physical properties. Properties of union fabric developed in a traditional handloom using 60s reed count. The quality parameters, viz., fabric tensile strength and elongation, crease recovery, drapability, thickness, abrasion, stiffness of the developed fabric, met essential apparel requirements. A comparative subjective evaluation of the fabric quality, viz., aesthetic appearance, luster, texture, was made with the help of a group of people from different age, educational and occupational background to examine the tactile properties as well as suitability of the fabric for the prepared products, all the respondents felt that eri x cotton twill, eri x polyester twill and eri x polyester satin were good in appearance. Texture and luster were found to be medium to high. About a very few respondents felt that fabrics were crispy.
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