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Sheets of mica Photomicrographs of a thin section containing phlogopite. In cross-polarized light on left, plane-polarized light on right. Dark mica from eastern Ontario. Micas (/ ˈ m aɪ k ə z / MY-kəz) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into extremely thin elastic plates.
The earliest examples of color codes in use are for long-distance communication by use of flags, as in semaphore communication. [1] The United Kingdom adopted a color code scheme for such communication wherein red signified danger and white signified safety, with other colors having similar assignments of meaning.
RYB (red, yellow, blue) is the traditional set of primary colors used for mixing pigments. It is used in art and art education, particularly in painting. It predated modern scientific color theory. Red, yellow, and blue are the primary colors of the RYB color "wheel". The secondary colors, violet (or purple), orange, and green (VOG) make up ...
For this reason, red and white phosphorus were designated by the United States Drug Enforcement Administration as List I precursor chemicals under 21 CFR 1310.02 effective on November 17, 2001. [144] In the United States, handlers of red or white phosphorus are subject to stringent regulatory controls.
King John I included a green Aviz cross on the red bordure of his banner. The red cross of the Order of Christ was used over a white field as a naval pennon during the Discoveries and frequently on ship sails. A green background version was a popular standard of the rebellious during the 1640 revolution that restored Portugal's independence ...
In photography and image processing, color balance is the global adjustment of the intensities of the colors (typically red, green, and blue primary colors). An important goal of this adjustment is to render specific colors – particularly neutral colors like white or grey – correctly.
The "rose of temperaments" (Temperamenten-Rose) compiled by Goethe and Schiller in 1798/9.The diagram matches twelve colors to human occupations or their character traits, grouped in the four temperaments: * choleric (red/orange/yellow): tyrants, heroes, adventurers * sanguine (yellow/green/cyan) hedonists, lovers, poets * phlegmatic (cyan/blue/violet): public speakers, historians ...
Confusion colors are pairs or groups of colors that will often be mistaken by the color blind. Confusion colors for red–green color blindness include: cyan and grey; rose-pink and grey; blue and purple; yellow and neon green; red, green, orange, brown; Confusion colors for tritan include: yellow and grey; blue and green; dark blue/violet and ...