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Color grading of diamonds was performed as a step of sorting rough diamonds for sale by the London Diamond Syndicate. As the diamond trade developed, early diamond grades were introduced. Without any co-operative development, these early grading systems lacked standard nomenclature and consistency. Some early grading scales were; I, II, III; A, AA, AAA; A, B, C. Numerous terms
A photograph color graded into orange and teal, complementary colors commonly used in Hollywood films. Color grading is a post-production process common to filmmaking and video editing of altering the appearance of an image for presentation in different environments on different devices.
This clarity scale mirrors the GIA grading scale, except nomenclature varies. The system names these clarity grades; Loupe Clean, Very, very small inclusions (VVS1 and VVS2), Very small inclusions (VS1 and VS2), Small inclusions (SI1 and SI2), Piqué (P1, P2, and P3; from a French word meaning "blemished"). [7] Clarity grading by WJC standards ...
APHA color, also referred to as the Hazen scale, and more appropriately as the Platinum Cobalt(Pt/Co) scale, [1] is a color standard named for the American Public Health Association and defined by ASTM D1209. [2] It was originally intended to describe the color of waste water, but its usage has expanded to include other industrial applications ...
Gardner color scale; H. Heat map; M. Martin scale; Martin–Schultz scale; Monk Skin Tone Scale; P. Pt/Co scale; V. Von Luschan's chromatic scale
The Fitzpatrick scale has been criticized for its Eurocentric bias and insufficient representation of global skin color diversity. [9] The scale originally was developed for classifying "white skin" in response to solar radiation, [2] and initially included only four categories focused on white skin, with "brown" and "black" skin types (V and VI) added as an afterthought.
The Gardner Color Scale is a one-dimensional scale used to measure the shade of the color yellow. [1] The Gardner scale and the APHA /Pt-Co/Hazen Color Scale overlap, with the Gardner scale measuring higher concentrations of yellow color and the APHA scale measuring very low levels of yellow color.
In grey scale the lightfastness is rated between 1–5. 1 being very poor and 5 being excellent lightfastness. [1] [2] [10] On ASTM scale the lightfastness is rated between I-V. I is excellent lightfastness and it corresponds to ratings 7–8 on Blue Wool Scale. V is very poor lightfastness and it corresponds to Blue Wool scale rating 1. [10]