Nippon Denshoku Industries Co.,ltd. Advanced Technology in Color and Brightness.
Development, Production, and Sales for the Color Measuring Instruments with High Accuracy Including Spectrophtometer, Colormeter, Haze Meter, Densitometer, Gloss Meter, At Wide Range of Environments. JAPANESE
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We have released the instruments with high accuracy which is useful for measuring the color and the light of materials. In this page, we introduce the basis of important information for measuring the color and the light including [preface of color story],[the three elements of color : hue - value - chroma], [munselll specification], [the recognition process of color], [the spectrum of light(spectrum distribution)], [the world of color for three-dimensional space of three stimulation value xyz], [what is ucs(uniform color space)], [example of color tolerance] and [unbalanced color judgement method]
Preface of Color Story / Color Story
The Three Elements of Color : Hue - Value -Chroma / Color Story
Munsell Specification / Color Story
Process of Recognizing Colors / Color Story
The Spectrum of Light (Spectrum Distribution) / Color Story
The World of Color which Three-Dimensional Space of Three Stimulation Value XYZ / Color Story
What is UCS (Uniform Color Space) ? / Color Story
Example of Allowance by Color / Color Story
Discoloration Assessment (Color Variation Judgement) / Color Story
Colors as a Three-Dimensional Universe
As shown above, the expressions of colors do not fit into a two-dimensional system but can best be represented in a three-dimensional universe. The three basic properties of color and their three-dimensional representation was first proposed by Albert H. Munsell, an American artist and teacher of the fine arts. He attached separate attributes such as hue, value and chroma to each of these three basic properties and also established other color concepts. The three elements, hue, value and chroma, are the three axes of the three-dimensional universe of color coordinates that forms the color sphere shown in Fig. 2.
 [Fig.2 : The Munsell Chromatic Sphere]
[Fig.2 : The Munsell Chromatic Sphere]
Munsell Specification
[Fig.3 : Three-Dimensional Universe]
Color is a phenomenon recognized by seeing and feeling. The expression method systematized based on human feeling is the specification method by three attributes. Hue, lightness, and chroma are defined as the elements of color that a human being feels, and each is systematized to be seen with equal rates perceptively. This system is provided for in the JIS.
Color specification is expressed in the order of hue and lightness/chroma, for example, bright red is specified as 5R 4/14. Colors as white, gray, etc., which do not have hue, are specified with the achromatic color mark N and the lightness, for example, as N5.
[Fig.4 : Hue Circle]
[Fig.4 : Hue Circle]
[Fig.3 : Three-Dimensional Universe]
[Fig.5 : Hue]
[Fig.5 : Hue]
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