The metallizing agent may be selected based on various factors...Malic acid derivatives as amorphous materials for phase change ink07/31/14 - 20140208979 - wherein R1 and R2 each, independently of the other, is an alkyl group, and further wherein the alkyl portion can be straight, branched or cyclic, saturated or unsaturated, substituted or unsubstituted, having from 1 to about 40 carbon atoms, an