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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. Polydimethylsiloxane - Wikipedia

    en.wikipedia.org/wiki/Polydimethylsiloxane

    2 Si(CH 3) 3 Cl + [Si(CH 3) 2 O] n−2 [Si(CH 3) 2 OH] 2 → [Si(CH 3) 2 O] n−2 [Si(CH 3) 2 OSi(CH 3) 3] 2 + 2 HCl. Silane precursors with more acid-forming groups and fewer methyl groups, such as methyltrichlorosilane, can be used to introduce branches or cross-links in the polymer chain. Under ideal conditions, each molecule of such a ...

  4. Color chart - Wikipedia

    en.wikipedia.org/wiki/Color_chart

    Color chips or color samples from a plastic pellet manufacturer that enables customers to evaluate the color range as molded objects to see final effects. A color chart or color reference card is a flat, physical object that has many different color samples present. They can be available as a single-page chart, or in the form of swatchbooks or ...

  5. Silicone - Wikipedia

    en.wikipedia.org/wiki/Silicone

    Silicone caulk can be used as a basic sealant against water and air penetration. In organosilicon and polymer chemistry, a silicone or polysiloxane is a polymer composed of repeating units of siloxane (−O−R 2 Si−O−SiR 2 −, where R = organic group). They are typically colorless oils or rubber-like substances. Silicones are used in ...

  6. ISCC–NBS system - Wikipedia

    en.wikipedia.org/wiki/ISCC–NBS_system

    Each of the 267 ISCC–NBS categories is defined by one or more "blocks" within the color solid of the Munsell color system, where each block includes colors falling in a specific interval in hue, value, and chroma, resulting in a shape which "might be called a sector of a right cylindrical annulus (like a piece of pie with the point bitten off ...

  7. Colour Index International - Wikipedia

    en.wikipedia.org/wiki/Colour_Index_International

    Structure Range Category Nitroso: 10000–10299 Nitro: 10300–10999 Monoazo: 11000–19999 Category:Azo dyes: Diazo: 20000–29999 Category:Azo dyes: Triazo