Morphology and transformation Fourier infra red spectral characters of cow, goat and rabbit skin

Abstract

The analytical method to determine the type of leather as a fashion product material, which is fast and accurate, needs to be developed. The analysis of skin type determination by matching the morphology and spectral character of FTIR (Fourier Transform Infrared) is a fast and accurate. An analytical data base for matching morphology and spectral characters should be provided. This article describes the results of the morphological analysis of cow, goat and rabbit skins, as well as their spectral characters analyzed by FTIR. The cow skin looks bumpy. hair comes out of the follicle hole, only one hair comes out of one follicle hole. The cow skin has a dense structure, the connective tissue under the epidermis is arranged in a unidirectional manner. The surface of the cow hair looks scaly and has a medulla. Rabbit skin surface looks wavy and grained, the hair follicles were arranged in groups, there are several follicles arranged in one group, consisting of one or more follicles that secrete one large hair surrounded by several follicles that secrete smaller hair. The rabbit skin dermis is less dense and more irregular structure than the cow’s dermis tissue. The surface of rabbit hair has a coronal pattern, the hair has not a round shaped medulla form. Goat skin surface looks keratinized, hair comes out of the follicle hole, only one hair comes out from one follicle hole, the size of hair is not uniform. The goat skin has a dense structure like cow skin structure, the connective tissue under the epidermis is arranged in a unidirectional manner. The cuticle surface of the goat hair looks scaly, and has a medulla in the center. The pattern of cuticle is wave, the distance between the wave pattern is closer than the wave pattern of cow’s hair cuticle. The results of FTIR analysis indicated that, analyzed animal skins contained collagen, the level of similarity in the peak pattern of FTIR absorption between cow skin and rabbit skin was higher when compared to the level of similarity between the peak patterns of the spectrum of cowhide and goat skin, or between rabbit and goat skin. The peak of collagen characteristics, peaks around 1035 cm−1 and 1079 cm−1 can be found in the spectrum of cow, goat and rabbit skin powder. The peak absorption which was always found in each spectrum of cow, goat and rabbit skin powder was 1234 cm−1 and 1454 cm−1.