It is natural-It is above all else.
In our world today, different articles are made of different materials; soft or hard, smooth or rough, big or smal. Among these materials, leather has found its footing as it is being used on quite a large scale. Leather is a strong long lasting but highly flexible material made from the hide of cattle or the skin of goat and sheep. It is such that its type and its origin, chemicals used for its processing, the recipe and its chemical and/or dyeing operations, sex and age many a lot mechanical operations of their production too, is a factor to its quality, thereby making it affordable to both the rich and the poor. Its use ranges from covering of footwear, leather goods- leather garments to key ring, purse or bag to book binding, from furniture upholstery to chamois leather. So What’s not?
The different stages of production give a form of the leather being used. Leather can either be tanned-wet blue (not ready to use rather a sage for long-term preservation to customize with further processing)- a stage for full Chrome, Semi-Chrome, Semi-vegetable leather- Crust and Finished, pretanned- a stage for short term preservation for production of Full Vegetable leather, crust or finished.
Crust leather is leather which is dried after retanning and dyeing (except of white or natural colour) process that undergoes further many mechanical operations. Tanning involves process which converts animal hide or skin to leather. The process of crust involves the tanned leather being thinned in accordance with customers’ requirement, re-tanned, dyeing and lubricated- fat liquoring. The type of tanning determines the type of crust leather being made; it could either be full Chrome, Semi-chrome, Semi-vegetable or full vegetable Crust Leather.
Full Chrome Crust: This is chrome tanned (wet blue) leather that goes through the crust process. However, it is still highly recognized as the most used method of tanning in this fashion industry.
Vegetable Crust: This is Vegetable tanned leather retanned from the pretanned leather that undergoes through the crust process for full vegetable leather. The tanning process involves using high percentage of tannin extract of vegetable origin.
As the name implies, it is the top most processing stage of leather. It has gone through coating/spray with dye many a lot chemicals as well or impregnation on and in-between several mechanical operations. It may be aniline (where pigment is not used resulting in sustaining its natural look, semi-aniline, resin, polish, brush off, glace kid, cationic finished leather and so on.
The different processes of crust and finishing provide and create different types of leather. Depending on what you need, the crust and finished leather can be used. Your taste of leather is determined by your pocket and what you need the item for.