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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. An alternative method, developed in the ...
Tannins produce different colors with ferric chloride (either blue, blue black, or green to greenish-black) according to the type of tannin. Iron gall ink is produced by treating a solution of tannins with iron(II) sulfate. [72] Tannins can also be used as a mordant, and is especially useful in natural dyeing of cellulose fibers such as cotton ...
The Third Antichrist was released in fall 2000 through Black Mark Production. A switch to Hammerheart Records led to Bloodhymns . In 2006, Necrophobic released Hrimthursum on Regain Records/Candlelight USA, and Death to All was issued in May 2009 and won the title of "Album of the Month" on the Metallian.com webzine.
Perhaps the most famous group of spiders that construct funnel-shaped webs is the Australian funnel-web spiders. There are 36 of them and some are dangerous as they produce a fast-acting and ...
Tanning may refer to: Tanning (leather), treating animal skins to produce leather; Sun tanning, using the sun to darken pale skin Indoor tanning, the use of artificial light in place of the sun; Sunless tanning, application of a stain or dye to the skin (active ingredient in tanning lotion products is dihydroxyacetone (DHA)).
Here's what kale is, why it's so good for you and why some people should still avoid overconsumption.
Losing the dark. Light pollution, the term for the brightening of the night sky by unnatural lights, is increasing worldwide. On average, skies are getting 10% brighter each year globally, with ...
Tanning the leather. This was a bark tanning process, similar to other vegetable-tanned leather. Saturating the tanned hide with birch oil. This is the most distinctive part of the process, giving Russia leather its water resistance and distinctive smell. Dyeing the leather either red or black.