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Royal Purple is an American manufacturer which produces lubricants for automotive, industrial, marine, and racing use. It is known primarily for its line of synthetic Royal Purple Motor Oil products used in gasoline and diesel engines.
Caput mortuum ( Latin for 'dead head', and variously spelled caput mortum or caput mortem ), also known as cardinal purple, is the name given to a purple variety of haematite iron oxide pigment, used in oil paints and paper dyes.
List of reagent testing color charts. 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]
Automotive paint is paint used on automobiles for both protective and decorative purposes. [1] [2] Water-based acrylic polyurethane enamel paint is currently the most widely used paint for reasons including reducing paint's environmental impact .
In formal color theory, purple colors often refer to the colors on the line of purples on the CIE chromaticity diagram (or colors that can be derived from colors on the line of purples), i.e., any color between red and violet, not including either red or violet themselves.
Like a similar methyl orange dye, it changes color to red in acidic pH. It can be easily detected in the fuel at levels as low as 0.3 ppm by extraction to a diluted hydrochloric acid , allowing detection of the red diesel added into motor diesel in amounts as low as 2–3%.