A transfer medium, made, for example, of paper, is imprinted with sublimable dispersion colorants by halftone printing methods, and is suitable for sublimation heat transfer printing on non-sealed anodized aluminum via the trichromatic principle. The three basic colors used for this purpose are yellow,...http://www.google.de/patents/US4171230?utm_source=gb-gplus-sharePatent US4171230 - Transfer medium which is suitable for heat transfer printing on aluminum
