Material identification of cowhide bag

Material identification of cowhide bag

Natural leather, also known as leather, has pores, but sometimes it is difficult to see with the naked eye. Another notable feature of natural leather is that there are defects on its surface. The natural leather commonly used in people’s life usually includes pig leather, buffalo leather, leather, horse leather and sheepskin leather.

The grain surface of pigskin leather has round and thick pores, which extend into the leather obliquely. The holes are arranged in three groups on the grain surface, forming a triangle pattern. The grain surface is uneven and has special patterns. In addition, pigskin leather has excellent wear resistance. The grain surface pores of buffalo leather are round and thick, and stretch into the leather vertically. The number of pores is more than that of the leather, and they are more evenly distributed on the leather surface. The grain surface is uneven and rough. Buffalo leather has poor abrasion resistance but high tensile strength. The pores on the grain surface of leather are round and extend into the leather vertically. The pores are evenly and closely distributed on the leather surface. The leather is plump and the grain surface is smooth and fine. Cowhide detection range: layer cow hide, cow leather wallet, cow leather shoes, cow leather bag, calf leather, consumption cow hide, leather, buffalo hide, raw cow hide, etc., and cow leather fiber leather.

Cowhide test items:

Physical property test: tensile strength, elongation, tearing strength, tensile strength, shrinkage temperature, spalling height, spalling strength, apparent density of leather, folding fastness of coating (normal temperature/low temperature), folding fastness of sole leather, water absorption, heat resistance, oil resistance, friction resistance, hair wave flame retardancy, etc. Chemical property test: pH value, hexavalent chromium content, formaldehyde content, banned azo dye, odor, glass volatile content, water content and volatile matter in cowhide, etc. Analysis items: composition analysis, detection of toxic and harmful substances, environmental protection detection, azo test, etc. Content determination: formaldehyde content, hexavalent chromium, azo, heavy metals, PCP, TeCP, OPP, free fatty acid content, organic tin compounds, etc. Color fastness: color fastness to rubbing, water stain, perspiration, light, etc.