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1 - Method 2 - Minsell system method

I.C.I. System

Method 1.C. Description Colors

The initials stand for .I. C. I to the International Commission of Illumination, and the same method identifies the n symbols with other symbols in non-English references. These symbols are: CIE in French, denoting commission Internationale de l'Eclairage, and in German. . . It denotes the Internationale Bleuchtung commission, and it is sometimes preferable to use the French symbols (...to prevent the mixing of the English symbols 1.C.1 with the trade name by which the Imperial Chemical Industries is known! Imperia chemical Industries, which is also symbolized by I.C.I.

It takes advantage of the 1.I. C in two things:

(1) In estimating the quantity of each of the primary colors of the rays, which, if mixed together, would produce a color similar to the match for the sample whose color specifications are requested. And it depends in setting these specifications based on what we knew previously that we can get any color by just mixing different quantities of the three primary colors (which are red, green, and blue). (b) The I.C.I method also examined the development of standard specifications for the light sources that we use in photography, based on an estimate of the amount of each of the red, green, and blue rays that the rays of this source consist of.

Color specifications are determined according to the method of . I.C.I based on the three characteristics of all colors. These characteristics are:

The origin of the color is 10, and some see its name as the color, but we prefer to use the first designation for its simplicity over the second. The origin of color is that property that results from different wavelengths of light, so it makes us call yellow, blue, orange, or violet. The origin of each of these colors differs from the other in its light wavelength. The origin of the color will not change except with this difference in the length of the light waves, and we have previously shown on page 7 the light wavelengths of the colors of the rays. Names like red and green and

2 - Saturation of color: the saturation of the color is related to the extent of its purity, i.e. the extent of its mixing with neutral colors (white, black and gray), and as an explanation for this Neutral Colors (we mention that if a blue color (from the colors of the drawing tubes) is mixed with a small amount of white paste, its saturation will decrease It becomes a whitish blue, i.e. pale blue, and its fading increases as the amount of white paste increases.It cannot be said at that time that the addition of white has changed the origin of the hue, as the wavelength of light has not changed, and the color has reached its maximum saturation if it were a color. Pure spectral There are three conditions (1) for the desaturation of color

Each of them has a separate expression. (1) Lack of saturation due to the mixing of the original color with some amount of white, and in these

In the case it is said that the original color has been tinted (b) lack of saturation because the original color has been mixed with some amount of black, and in this case it is said that the original color has been shaded.

(1) A lack of saturation due to mixing the origin of the color with some gray, and here it is said that the color has been neutralized (2) or (Neutralized). In both cases (b) and (h), the color has become “darker.”

(1) Taylor. Coleur Technolgy P. 18 (2) Huwaid from Neutrality.