The charging characteristics of toner are among the most important end-use properties within modern xerography. Toner charge stability is the ultimate design goal helping to make color printer more competitive in comparison to other printing technologies. In this study the tribocharge property of different color toner are compared. Particular emphasis was given to the humidity response of these composite materials. A standard test procedure has been developed.The styrene-acrylic chemically prepared color toner analyzed here and most polyester toner show an unstable charging level with respect to humidity. In contrast, a stable humidity response was realized for toner based on cycloolefin copolymer binder resins. With these materials, consistent image print quality can be expected, which is unaffected by environmental conditions.