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Some leather sold as "buckskin" may now be sheepskin tanned with modern chromate tanning chemicals and dyed to resemble real buckskin. Traditionally, Native American Indians would scrape away the excessive fat clinging to the hide, and this would be followed by working the raw hide with the brain tissue of an animal. [1]
Tanning, or hide tanning, is the process of treating skins and hides of animals to produce leather. A tannery is the place where the skins are processed. Historically, vegetable based tanning used tannin , an acidic chemical compound derived from the bark of certain trees, in the production of leather.
Brain tanned leathers are made by a labor-intensive process that uses emulsified oils, often those of animal brains such as deer, cattle, and buffalo. An example of this kind is buckskin . Leather products made in this manner are known for their exceptional softness and washability.
Buffalo hides, as well as deer, elk, and other animal hides, are painted. Clothing and robes are often brain-tanned to be soft and supple. Parfleches, shields, and moccasin soles are rawhide for toughness. In the past, Plains artists used a bone or wood stylus to paint with natural mineral and vegetable pigments.
The principal difference between raw hides and tanned hides is that raw hides dry out to form a hard inflexible material that can putrefy when re-wetted (wetted back), while tanned material dries out to a flexible form that does not become putrid when wetted back. A large number of different tanning methods and materials can be used; the choice ...
They also underwent magnetic resonance imaging (MRI) scans to assess cerebral white matter lesions, hippocampal volume, and total brain volume. The researchers controlled for sociodemographic ...
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