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2. Diamond-like carbon - Wikipedia

   en.wikipedia.org/wiki/Diamond-like_carbon

   Diamond-like carbon (DLC) is a class of amorphous carbon material that displays some of the typical properties of diamond. DLC is usually applied as coatings to other materials that could benefit from such properties. [1] DLC exists in seven different forms. [2] All seven contain significant amounts of sp 3 hybridized carbon atoms.

3. Anti-scratch coating - Wikipedia

   en.wikipedia.org/wiki/Anti-scratch_coating

   Anti-scratch coating is a type of protective coating or film applied to an object's surface for mitigation against scratches. Scratches are small surface-level cuts left on a surface following interaction with a sharper object. Anti-scratch coatings provide scratch resistances by containing tiny microscopic materials with scratch-resistant ...

4. Black oxide - Wikipedia

   en.wikipedia.org/wiki/Black_oxide

   The surface finish is usually satin, but it can be turned glossy by coating in a clear high-gloss enamel. [8] On a microscopic scale dendrites form on the surface finish, which trap light and increase absorptivity. Because of this property the coating is used in aerospace, microscopy and other optical applications to minimise light reflection. [8]

5. Diamond enhancement - Wikipedia

   en.wikipedia.org/wiki/Diamond_enhancement

   These coatings effectively whiten the apparent color of a yellow-tinted diamond, because the two colors are complementary and act to cancel each other out. Usually only applied to the pavilion or girdle region of a diamond, these coatings are among the hardest treatments to detect—while the dyes may be removed in hot water or alcohol with ...

6. Surface finishing - Wikipedia

   en.wikipedia.org/wiki/Surface_finishing

   A #7 finish is produced by polishing with a 280–320 grit belt or wheel and sisal buffing with a cut and color compound. This is a semi-bright finish that will still have some polishing lines but they will be very dull. Carbon steel and iron are commonly polished to a #7 finish before chrome plating.

7. Diamond cutting - Wikipedia

   en.wikipedia.org/wiki/Diamond_cutting

   Diamond cutting, as well as overall processing, is concentrated in a few cities around the world. The main diamond trading centers are Antwerp, Tel Aviv, and Dubai from where roughs are sent to the main processing centers of India and China. [3] Diamonds are cut and polished in Surat, India and the Chinese cities of Guangzhou and Shenzhen. [4]