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Some storage boxes contain materials, such as wood, acidic paper, rubber, and adhesives, that can off-gas corrosive materials. Conservators wear nitrile gloves when handling silver to prevent oils, ammonia, and salts from the skin from corroding the surface.
A bench jeweler is an artisan who uses a combination of skills to make and repair jewelry. Some of the more common skills that a bench jeweler might employ include antique restoration, silversmithing , goldsmithing , stone setting , engraving , fabrication , wax carving , lost-wax casting , electroplating , forging , & polishing .
The aqueous solution in the classical reaction contains glucose, sodium hydroxide and methylene blue. [14] In the first step an acyloin of glucose is formed. The next step is a redox reaction of the acyloin with methylene blue in which the glucose is oxidized to diketone in alkaline solution [6] and methylene blue is reduced to colorless leucomethylene blue.
With some exceptions (e.g., platinum soldering in jewelry), the oxidizing flame is usually undesirable for welding and soldering, since, as its name suggests, it oxidizes the metal's surface. [2] The same principle is important in firing pottery.
A closure may be a cap, cover, lid, plug, liner, or the like. [1] The part of the container to which the closure is applied is called the finish. [2] Other types of containers such as boxes and drums may also have closures but are not discussed in this article. Many containers and packages require a means of closing, which can be a separate ...
Conservation treatments include dry cleaning, wet cleaning, consolidation and filling losses. Eastern cultures use Asian lacquer to repair damages and fill and consolidate losses. Western cultures typically use alternate materials that can be reversed with minimal risk to the original object.
Brazing practice. Brazing is a metal-joining process in which two or more metal items are joined by melting and flowing a filler metal into the joint, with the filler metal having a lower melting point than the adjoining metal.
Chemical coloring of metals is primarily used in the manufacture of sculptures, jewelry, badges, medals,clocks, watches and decorations. It is also used in architecture, metallography, in the manufacture of metal furniture, and for military purposes as well as decorative vessels.
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