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2. Conservation and restoration of bone, horn, and antler objects

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

   As an added safety measure you can also implement a policy to minimize the opening of doors and windows, as well as retrofitting seals and doing secondary glazing on glass. [18] Finally, pollutant absorbers, such as activated charcoal can be added to display cases, or even placed in storage areas to add another layer of protection. [16]

3. Passivation (chemistry) - Wikipedia

   en.wikipedia.org/wiki/Passivation_(chemistry)

   In physical chemistry and engineering, passivation is coating a material so that it becomes "passive", that is, less readily affected or corroded by the environment. . Passivation involves creation of an outer layer of shield material that is applied as a microcoating, created by chemical reaction with the base material, or allowed to build by spontaneous oxidation

4. Anodizing - Wikipedia

   en.wikipedia.org/wiki/Anodizing

   Coatings of moderate thickness 1.8 μm to 25 μm (0.00007" to 0.001") [16] are known as Type II in North America, as named by MIL-A-8625, while coatings thicker than 25 μm (0.001") are known as Type III, hard-coat, hard anodizing, or engineered anodizing. Very thin coatings similar to those produced by chromic anodizing are known as Type IIB.

5. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   The glass sample vial of the corrosive and poisonous liquid has been cast into an acrylic plastic cube. Methyl methacrylate "synthetic resin" for casting (simply the bulk liquid chemical) may be used in conjunction with a polymerization catalyst such as methyl ethyl ketone peroxide (MEKP), to produce hardened transparent PMMA in any shape, from ...

6. Dichroic glass - Wikipedia

   en.wikipedia.org/wiki/Dichroic_glass

   A pendant made from modern dichroic glass. Dichroic glass is glass which can display multiple different colors depending on lighting conditions.. One dichroic material is a modern composite non-translucent glass that is produced by stacking layers of metal oxides which give the glass shifting colors depending on the angle of view, causing an array of colors to be displayed as an example of ...

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8. Gold plating - Wikipedia

   en.wikipedia.org/wiki/Gold_plating

   Gold plated - gold layer thickness greater than or equal to 0.5 micron; Heavy gold plated / Vermeil - gold layer thickness greater than or equal to 2.5 micron; Gold plated silver jewellery can still tarnish as the silver atoms diffuse into the gold layer, causing slow gradual fading of its color and eventually causing tarnishing of the surface ...

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