Patent ID: 8278018

Claim:
A method of matching a toner to a target color of a different color system comprising: (a) forming a sample toner comprising one or more primary toners by blending two or more colorants; (b) forming a sample color specimen comprising a printed image comprising the sample toner; (c) measuring a spectral distribution curve for the sample color specimen and comparing it to the spectral distribution curve for a specimen of the target color, wherein the target color specimen comprises a different primary toner than the sample toner and is printed and determining a % root mean square difference between the spectral distribution curves, a color difference value ΔE between the sample color specimen and the target color specimen, and a general index of metamerism (GMI); and (d) repeating steps a-c until the % root mean square difference is about 12% or less and until the GMI is less than about four.