Search results
Results from the WOW.Com Content Network
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.
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.
Pocket boxes are usually made to hold a small amount of snuff for immediate consumption—typically a day or two's supply. [2] Since prolonged exposure to air causes snuff to dry out and compromises its quality, snuff boxes have tightly sealed lids to ensure that air does not penetrate the box, although wholly air-tight boxes are a rarity.
An Italian jewelry casket, 1857, carved walnut, lined with red velvet. A casket [1] is a decorative box or container that is usually smaller than a chest and is typically decorated. In recent centuries they are often used as boxes for jewelry, but in earlier periods they were also used for keeping important documents and many other purposes. [2]
Bronze disease is an irreversible and nearly inexorable corrosion process that occurs when chlorides come into contact with bronze or other copper-bearing alloys. [1] It can occur as both a dark green coating, or as a much lighter whitish fuzzy or furry green coating. [1]
A common example of galvanic corrosion occurs in galvanized iron, a sheet of iron or steel covered with a zinc coating.Even when the protective zinc coating is broken, the underlying steel is not attacked.
Plus, the lid itself is oven safe up to 400F and doubles a trivet to keep your counters and tabletops safe from scorching-hot pan bottoms. To clean it, toss it in the dishwasher. It comes with a ...
Disc rot is the tendency of CD, DVD, or other optical discs to become unreadable because of chemical deterioration. The causes include oxidation of the reflective layer, reactions with contaminants, ultra-violet light damage, and de-bonding of the adhesive used to adhere the layers of the disc together.