Search results
Results from the WOW.Com Content Network
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]
The production and improvement of colorants was a driver of the early synthetic chemical industry, in fact many of today's largest chemical producers started as dye-works in the late 19th or early 20th centuries, including Bayer AG (1863). [2]
The ColorChecker Classic chart is a rectangular card measuring about 11 by 8.25 inches (27.9 by 21.0 cm), or in its original incarnation about 13 by 9 inches (33 by 23 cm), an aspect ratio approximately the same as that of 35 mm film. [5]
The chart ran for 140 weeks from 2012 to 2015, during which time a total of 23 singles by 22 artists reached number one. The most successful artist was the Italian pianist Ludovico Einaudi , who topped the chart with three singles for a total of 54 weeks, while the most successful record label was Decca Records , which spent 89 weeks at number ...
In colloquial speech, RAL refers to the RAL Classic system, mainly used for varnish and powder coating, but now plastics as well. Approved RAL products are provided with a hologram to make unauthorised versions difficult to produce. Imitations may show different hue and colour when observed under various light sources.
A leuco dye (from the Greek λευκό leuko: white ) is a dye which can switch between two chemical forms, one of which is colorless. Reversible transformations can be caused by heat, light or pH , resulting in examples of thermochromism , photochromism and halochromism , respectively.
The CMYK model works by partially or entirely masking colors on a lighter, usually white, background. The ink reduces the light that would otherwise be reflected. Such a model is called subtractive because inks subtract some colors from white light; in the CMY model, white light minus red leaves cyan, white light minus green leaves magenta, and ...
Color charts can take custom forms, as for example the calibration target used by the Curiosity rover for its Mars Hand Lens Imager (MAHLI). The European Pharmacopoeia monograph 2.2.2 is a method to determine the degree of coloration in liquids, applied to pharmacological compounds, drug substances and finished product.