Search results
Results From The WOW.Com Content Network
Leather painting differs from leather dyeing in that paint remains only on the surface while dyes are absorbed into the leather. Due to this difference, leather painting techniques are generally not used on items that can or must bend nor on items that receive friction, such as belts and wallets because under these conditions, the paint may crack or wear off.
Tanning was being carried out by the inhabitants of Mehrgarh in Pakistan between 7000 and 3300 BCE. [1] Around 2500 BCE, the Sumerians began using leather, affixed by copper studs, on chariot wheels. [citation needed] The process of tanning was also used for boats and fishing vessels: ropes, nets, and sails were tanned using tree bark. [2]
A tanner treating leather in Morocco. Bating is a technical term used in the tanning industry to denote leather that has been treated with hen or pigeon manure, similar to puering (see puer) where the leather has been treated with dog excrement, and which treatment, in both cases, was performed on the raw hide prior to tanning in order to render the skins, and the subsequent leather, soft and ...
Gold −1.50 V. The oxidation potential is important because it is one indicator of how tightly bound to the ore the metal is likely to be. As can be seen, iron is significantly higher than the other six metals while gold is dramatically lower than the six above it. Gold's low oxidation is one of the main reasons that gold is found in nuggets.
The Apicius manuscript (ca. 900 CE) of the monastery of Fulda in Germany, which was acquired in 1929 by the New York Academy of Medicine. Apicius, also known as De re culinaria or De re coquinaria (On the Subject of Cooking), is a collection of Roman cookery recipes, which may have been compiled in the fifth century CE, [1] or earlier.