Identification of Pig Skin Leather, Bovine Hide Leather and Goat Skin Leather according to the Characteristics of Collagen Bundle after the Tearing

The pig skin leather, bovine hide leather and goat skin leather along the seam were teared . A lot of collagen bundle appeared on the split, and were tested under a microscope. And the length and thickness of collagen bundle have been measured. The degree of collagen fiber dispersion and other microscopic characteristics can be observed. All the test data were compared with standard leather database. The results showed that the length of collagen bundle appeared from 4mm to 10 mm, the thickness of collagen bundle range from 20 μm to 40 μm. And the degree of collagen fiber dispersion was very small, the collagen bundle appeared a little flat and very straight, which indicated pig skin leather properties. The length of collagen bundle showed from 3 mm to 10 mm, the thickness of collagen bundle range from 70 μm to 140 μm, and the degree of collagen fiber dispersion was a little small. The collagen bundle looked more round, the all properties together indicated bovine hide leather; and which the length of collagen bundle was within 6 mm, the thickness of collagen bundle range from 30 μm to 70 μm, and the degree of collagen fiber dispersion is more great, the collagen bundle looks a little flat and a bit curly, the all properties together indicate goat skin leather.