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Such use of liquid masterbatches allows highly accurate dosing and quick color changes between machine runs. [3] [4] Masterbatches are highly concentrated compared to the target composition, with high "let-down ratios"; for example, often 25 kgs of a masterbatch can be used to compound one ton of base polymer. [5]
The International Commission for Uniform Methods of Sugar Analysis (ICUMSA) is an international standards body, founded in 1897, [1] [2] that publishes detailed laboratory procedures for the analysis of sugar. The ICUMSA Methods Book [3] contains detailed instructions for analyzing raw, cane, white, beet, molasses, plantation white and ...
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]
A basic formula [4] to calculate beer strength based on the difference between the original and final SG is: A B V = 131.25 ( O G − F G ) {\displaystyle ABV=131.25(OG-FG)} The formula below [ 5 ] is an alternate equation which provides more accurate estimates at higher alcohol percentages (it is typically used for beers above 6 or 7%).
The following formulas can be used to calculate the volumes of solute (V solute) and solvent (V solvent) to be used: [1] = = where V total is the desired total volume, and F is the desired dilution factor number (the number in the position of F if expressed as "1/F dilution factor" or "xF dilution"). However, some solutions and mixtures take up ...
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Colorants (both dyes and pigments) are listed using a dual classification which use the Colour Index Generic Name (the prime identifier) and Colour Index Constitution Numbers. These numbers are prefixed with C.I. or CI, for example, C.I. Acid Orange 7 or C.I. 15510. (This abbreviation is sometimes mistakenly thought to be CL, due to the font ...
Color Time (s) Notes MDMA or MDA: purple to black 0–5: May have dark purple tint Amphetamine, or methamphetamine: orange to brown 0–5: May have a brown tint 2C-B: yellow to green 5–10: Color may change from initial result [7] DXM: gray to black 15–30: Initially no change; takes much longer to reach black than MDMA