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Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, and rust or scale from ferrous metals, copper, precious metals and aluminium alloys. [1] A solution called pickle liquor , which usually contains acid , is used to remove the surface impurities.
In interior design, a wash or color wash of paint on a wall can be used to create a textured effect as a faux finish. [2] In ceramics, a wash is typically a coloring oxide thinned with water applied to the piece to achieve an effect similar to a glaze. [3] Digital image creation software can have features that simulate the painting technique. [4]
Whitewash can be tinted for decorative use and is sometimes painted inside structures such as the hallways of apartment buildings. A small amount can rub off onto clothing . In Britain and Ireland, whitewash was used historically in interiors and exteriors of workers' cottages and still retains something of this association with rural poverty .
A quick, water-saving, and archival technique for washing film fixed with nonhardening fixer in a spiral tank is the popular "Ilford method": [2] Fill the developing tank with tap water at the same temperature as the fixer (+/-5 °C or 9°F)—maintaining a constant bath temperature during processing is necessary to avoid reticulation of the ...
A large number of different tanning methods and materials can be used; the choice is ultimately dependent on the end application of the leather. The most commonly used tanning material is chromium, which leaves the leather, once tanned, a pale blue colour. This product is commonly called “wet blue”.
Use 20% aqueous solution of ferric chloride, it is necessary to immerse the objects in solution, dry and wax or varnish. [30] Gray-black for zinc. Use 20% aqueous solution of ferric chloride, the objects are immersed for 20 minutes, after the appearance of colour, objects should be washed, dried and waxed or varnished. [30] Black for aluminum
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