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  2. Conservation and restoration of paintings - Wikipedia

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

    Oil paint is a medium made up of pigments and a drying oil binding agent. Various other ingredients can be mixed in to condition the paint in several ways and modify its various properties and drying. [1] Oil paintings are painted on various surface support types. Oil on canvas, oil on board, and oil on metal are only some examples of oil ...

  3. Sight glass - Wikipedia

    en.wikipedia.org/wiki/Sight_glass

    The modern industrial sight glass is a glass disk held between two metal frames, which are secured by bolts and gaskets, or the glass disc is fused to the metal frame during manufacture. The glass used for this purpose is either soda lime glass or borosilicate glass , and the metal, usually a type of stainless steel, is chosen for desired ...

  4. Gear oil - Wikipedia

    en.wikipedia.org/wiki/Gear_oil

    For example, most modern gearboxes require a GL-4 oil, and separate differentials (where fitted) require a GL-5 oil. While they take the same form, the viscosity grades for gear oils are on a different scale than the viscosity grades for an engine oil. The viscometrics for gear oils are standardized in SAE J306.

  5. Automatic lubricator - Wikipedia

    en.wikipedia.org/wiki/Automatic_lubricator

    A screwed oil filler cap is fitted to the lockable hinged lid of the reservoir and a sight glass for indicating the oil level is fitted to the front face of the reservoir. The pumps of the DV type lubricator are operated by a sliding shaft assembly, unlike the Silverton or Wakefield lubricators which are operated by a rotating camshaft.

  6. Is This the Most Expensive Tiffany Stained-Glass Window of ...

    www.aol.com/most-expensive-tiffany-stained-glass...

    When the dazzling 16-foot-high leaded stained- glass window arrived in Canton in 1913, it made front-page news—and postponed the new church’s dedication by a week because of a shipping delay.

  7. Lining of paintings - Wikipedia

    en.wikipedia.org/wiki/Lining_of_paintings

    Prior to the 1974 Comparative Lining Conference, the lining of paintings was a universal practice. [2] 19th century liners undertook the practice in order to strengthen canvasses and potentially prevent future damage. This was achieved by introducing extremely rigid supports to paintings.