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2. Alumina effect pigment - Wikipedia

   en.wikipedia.org/wiki/Alumina_effect_pigment

   The effect is visible already at concentrations of 0.1% in the paint system. The intensity is steadily increased up to pigment concentrations of about 2%. The single light spots arising from the pigment structure and orientation in the paint system seem to spring back and forth when a painted metal plate is tilted.

3. Chemical coloring of metals - Wikipedia

   en.wikipedia.org/wiki/Chemical_coloring_of_metals

   Chemical coloring of metals is the process of changing the color of metal surfaces with different chemical solutions. The chemical coloring of metals can be split into three types: electroplating – coating the metal surface with another metal using electrolysis. patination – chemically reacting the metal surface to form a colored oxide or ...

4. Metal roof - Wikipedia

   en.wikipedia.org/wiki/Metal_roof

   Metal roofs can last up to 100 years, with installers providing 50-year warranties. [citation needed] Because of their longevity, most metal roofs are less expensive than asphalt shingles in the long term. [10] Metal roofing can consist of a high percentage of recycled material and is 100% recyclable. [11]

5. Tint, shade and tone - Wikipedia

   en.wikipedia.org/wiki/Tint,_shade_and_tone

   A tone is produced either by mixing a color with gray, or by both tinting and shading. [1] Mixing a color with any neutral color (including black, gray, and white) reduces the chroma , or colorfulness , while the hue (the relative mixture of red, green, blue, etc., depending on the colorspace) remains unchanged.

6. Metallic color - Wikipedia

   en.wikipedia.org/wiki/Metallic_color

   Such colors "are made from a combination of different pigments and aluminum flakes that have different weights and particle sizes". [2] Crayon-maker Crayola has manufactured several lines of "metallic" products, including "Metallic FX" crayons, [3] and "Metallic Colors" colored pencils, which have flecks of sparkles to achieve the metallic effect.

7. Chromate conversion coating - Wikipedia

   en.wikipedia.org/wiki/Chromate_conversion_coating

   The chromate coating acts as paint does, protecting the zinc from white corrosion, thus making the part considerably more durable, depending on the chromate layer's thickness. [ 8 ] [ 9 ] [ 10 ] The protective effect of chromate coatings on zinc is indicated by color, progressing from clear/blue to yellow, gold, olive drab and black.