International Gold Number Color
The International Gold Number (IGN) color system is a standardized method for specifying the color of gold. It is used in jewelry and other industries to ensure consistency and accuracy in color matching.
The IGN system is based on the Munsell color system, which uses three parameters: hue, value, and chroma. Hue refers to the basic color, such as red, blue, or yellow. Value refers to the lightness or darkness of the color, and chroma refers to the saturation or intensity of the color.
In the IGN system, gold is classified into three main categories:
* Yellow gold: This type of gold has a hue that ranges from 2.5 to 5.0 on the Munsell scale, a value of 4 to 8, and a chroma of 4 to 12.
* Rose gold: This type of gold has a hue that ranges from 5.0 to 7.5 on the Munsell scale, a value of 4 to 8, and a chroma of 4 to 12.
* White gold: This type of gold has a hue that ranges from 7.5 to 10.0 on the Munsell scale, a value of 4 to 8, and a chroma of 4 to 12.
Within each of these categories, gold can be further classified by its karat weight. Karat weight refers to the purity of gold, with 24 karats being pure gold. The higher the karat weight, the more pure the gold and the more valuable it is.
The IGN color system is used to ensure that the color of gold matches the desired specifications. This is important for jewelry, as the color of gold can affect its aesthetic appeal and value. The IGN system also helps to ensure consistency in color matching, as it provides a common language for describing the color of gold.
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