Excerpt from Measurement and Specification of the Physical Factors Which Determine the Saturation of Certain Tints of Yellow
The following Characteristics of this specification should be particularly I. Strictly speaking, it does not specify color, but merely speci fies a property which, in practice, will not allow of saturated tints of yellow. Its sole purpose is to state a simple physical require ment, the fulfillment of which is practically incompatible with the substance appearing Of a very saturated yellow tint. For example, oleomargarine or butter conforming to this specification might have any of a variety of colors, including green and violet.