A simple sample lifter was developed for obtaining a specimen of toner from the copy free of paper fibers. Toner obtained from a single, standard typewriter-sized character usually provided enough organic material to give a satisfactory pyrogram. Based upon the presence or absence of peaks in the pyrograms, the toners were separated into 18 classes. Most of the toner classes fell into two general groups: those containing a large amount of styrene, usually with smaller amounts of butyl methacrylate or other methacrylates or acrylates, or some combination of these chemicals; and those toners consisting mainly of some type of epoxy resin. (Author abstract)