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  2. Conservation and restoration of glass objects - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Incorrect relative humidity in glass objects can lead to crizzling or weeping of glass. Crizzling can occur when relative humidity is below 40%, and lead to cracks in its surface. Glass weeping or sweating can occur when relative humidity is above 55% and loses luster. [6] Thieves and vandals are a potential problem for any object. Since glass ...

  3. Hardpan - Wikipedia

    en.wikipedia.org/wiki/Hardpan

    In soil science, agriculture and gardening, hardpan or soil pan is a dense layer of soil, usually found below the uppermost topsoil layer. [1] There are different types of hardpan, all sharing the general characteristic of being a distinct soil layer that is largely impervious to water. Some hardpans are formed by deposits in the soil that fuse ...

  4. Conservation and restoration of photographic plates - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Broken or cracked glass plates are stored specially, separate from other photographic plates, and in the following ways: Broken glass plates are stored flat, unlike intact plates stored vertically. Stacking broken plates only five plates high is recommended due to the plates' weight. This will prevent further breakage and damage. [29]

  5. Shelf (storage) - Wikipedia

    en.wikipedia.org/wiki/Shelf_(storage)

    A shelf can be attached to a wall or other vertical surface, be suspended from a ceiling, be a part of a free-standing frame unit, or it can be part of a piece of furniture such as a cabinet, bookcase, entertainment center, headboard, and so on. Usually, two to six shelves make up a unit, each shelf being attached perpendicularly to the ...

  6. Gibson Appliance - Wikipedia

    en.wikipedia.org/wiki/Gibson_Appliance

    The company was purchased by Frank Gibson, a competing manufacturer of "ice refrigerators" in the early 1900s. It was the largest in its industry at the time. In 1931, the company began making electric refrigerators. [1] During the Second World War, Gibson manufactured 1,078 Waco CG-4 troop and cargo assault gliders under license.

  7. Floating shelf - Wikipedia

    en.wikipedia.org/wiki/Floating_shelf

    A floating shelf can be supported on hidden rods or bars that have been attached to studs. A thick floating shelf may be made of a hollow-core shelf glued to a cleat. [7] A floating shelf may have two or more channels open from the back towards, but without reaching, the front, into which slide fasteners attached to the wall, typically held in place by screws inserted through the bottom of the ...

  8. Mobile shelving - Wikipedia

    en.wikipedia.org/wiki/Mobile_shelving

    Units can be closely packed when access is not required, but can be readily moved to open up an aisle to allow access. By eliminating the need for a permanently open aisle between every unit, a smaller proportion of floor space can be allocated to storage than in the case of conventional fixed shelving, or a higher capacity of storage can be ...

  9. Glass cutter - Wikipedia

    en.wikipedia.org/wiki/Glass_cutter

    Glass cutter, showing hardened steel cutting wheel (far left), notches for snapping, and ball (on end of handle) for tapping. A glass cutter is a tool used to make a shallow score in one surface of a piece of glass (normally a flat one) that is to be broken in two pieces, for example to fit a window.