Chemical treatment of raw animal hides or skins to convert them into leather. Vegetable tanning (using bark, wood, roots, or berries) has been practiced since prehistoric times. After removal of hair, flesh, or fat, a tanning agent displaces water from the interstices between the protein (mostly collagen) fibres in the skin and cements the fibres together. The agents most widely used are vegetable tannin, salts such as chromium sulfate, and fish or animal oil. The tanning of fair skin in humans by sunlight is completely different: ultraviolet light causes production and redistribution of the pigment melanin in epidermal cells
If a part of your body tans or if you tan it, your skin becomes darker than usual because you spend a lot of time in the sun. I have very pale skin that never tans Leigh rolled over on her stomach to tan her back. + tanned tanned Their skin was tanned and glowing from their weeks at the sea
To convert (the skin of an animal) into leather, as by usual process of steeping it in an infusion of oak or some other bark, whereby it is impregnated with tannin, or tannic acid (which exists in several species of bark), and is thus rendered firm, durable, and in some degree impervious to water
When your skin is damaged by exposure to the UVA and UVB rays of the sun, its reaction is to produce more melanin as an attempt to protect itself against further damage Melanocytes (produce Melanin) float within the epidermis and don't migrate to the top Melanin is a brown colored protein that helps determine the color of our skin The Melanin that the melanocytes make finds its way into the keratinocytes (the cells containing the keratin) as they make their way up to the surface The melanocytes produce more melanin when we are exposed to the sun The result of this is a tan
a light brown a browning of the skin resulting from exposure to the rays of the sun get a tan, from wind or sun treat skins and hides with tannic acid so as to convert them into leather of a light yellowish-brown color
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