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2. List of reagent testing color charts - Wikipedia

   en.wikipedia.org/wiki/List_of_reagent_testing...

   It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2]

3. ISCC–NBS system - Wikipedia

   en.wikipedia.org/wiki/ISCC–NBS_system

   In 1965, the NBS published Centroid Color Charts made up of color samples demonstrating the central color in each category, as a physical representation of the system usable by the public, and also published The Universal Color Language, a more general system for color designation with various degrees of precision from completely generic (13 ...

4. Standard Color Reference of America - Wikipedia

   en.wikipedia.org/wiki/Standard_Color_Reference...

   The Standard Color Reference of America was issued in 1915 for the purpose of simplifying color work by standardizing color for the U.S. The card offers a palette for color choice and at the same time help to facilitate the selection of colors. Primarily directed to the textile, fashion and environmental industries.

5. Thermochromic ink - Wikipedia

   en.wikipedia.org/wiki/Thermochromic_ink

   Thermochromic ink (also called thermochromatic ink) is a type of dye that changes color in response to a change in temperature. [1] [2] [3] It was first used in the 1970s in novelty toys like mood rings, but has found some practical uses in things such as thermometers, product packaging, and pens. [4]

6. Automotive paint - Wikipedia

   en.wikipedia.org/wiki/Automotive_paint

   The base coat is applied after the primer coat. This coat contains the visual properties of color and effects, and is usually the one referred to as the paint. Base coat used in automotive applications is commonly divided into three categories: solid, metallic, and pearlescent pigments. Solid paints have no sparkle effects except the color ...

7. Dye penetrant inspection - Wikipedia

   en.wikipedia.org/wiki/Dye_penetrant_inspection

   Dye penetrant inspection (DP), also called liquid penetrate inspection (LPI) or penetrant testing (PT), is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials (metals, plastics, or ceramics).