Since the beginning of mankind, the leather was used as shelter and decorative element. Today, techniques enhance these two uses more than ever.The leather is animal skin chemically prepared to produce a robust, flexible and rot resistant material. Almost all world leather production comes from cattle, goat and sheep skins. Skins of horse, pig, Kangaroo, deer, seals, walrus and various reptiles are also used, to a lesser extent. From the earliest times man has been dedicated to working the leather and in an ingenious way could turn it into a series of comfortable and useful objects.
From the beginning, with delicate and artistic tasks and laborious efforts work on skin have generated an undeniable fascination.In prehistory, the colorful and romantic attraction exerted by this material stimulated the imagination of man and sparked his interest. The leather production became one of the oldest trades of the human being and the leather, richness of very ancient cultures. Thousands of discoveries demonstrate that humans used hides and animal skins to cover the cold and adorn themselves. This double function, to which is added the combination of modern and aesthetic attributes that can be viewed in shoes, upholstery, furniture, seats of automobiles, leather goods and clothing is maintained until today. Factors that count for the popularity of this material are its three-dimensional fibrous link and its associated porosity, as also the natural chemistry of the skin based on the collagen structure. These factors are the origin of important physical attributes for the clothing as the permeability to water vapour and the ability of accumulate 30% steam without losing the touch dry, as well as the properties of stretch by force independent of the temperature, which enables direct resistance with the smoothness and elasticity without problems of deformation. The raw materials used by the leather industry are above all by-products of the meat industry. After you kill and skin the animal and before starting the from tanning, the skins unwrought heal salting them or drying them.
Within the most common methods of curing salt is either by wet salting or curing brine. Tanner may make changes to the already given by nature. It is possible to change the appearance of the surface by sanding as in the case of the nubuck and etched plates of fantasy. Read additional details here: Clarion Project. Can be dyed leather with various dyes and influencing characteristics such as light resistance, abrasion, solidity to scratch, to repeated push-ups, oil by different technologies and water repellency. Besides the leather keeps excellent ageing stability. These properties make that, today, 1.5 billion square meters are transformed into footwear, upholstery, clothing, leather goods and to 500,000 tons, in sole and leather technical.Originally, vegetables such as bark, wood, leaves and roots, mostly from plants or tropical mimosa and quebracho chestnut were used for tanning. Old grease or oil tanning and tanning with salts of aluminum today have very little demand. In vegetable tanning, the agent that prevents skin rot and shrink is a substance known as tannin, which is extracted from the bark, wood, fruits and leaves of some trees. Among the sources of tannin are the bark of mangrove of the island of Borneo, the bark of acacia from South Africa, the wood of the quebracho colorado of South America, the fruit of myrobalan, the India and the bark of the oak. Original author and source of the article.