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Sandpaper surgery has produced cosmetic improvement for facial scars. The record of such improvement has usually been preserved with photographs. A better record may be obtained with impression molds like those used in dentistry. The technique to be described is satisfactory but there is still much room for improvement. Other methods are still being investigated, such as positive vs. negative molds and plaster vs. rubber or agar molds.
Imprinting on flat surfaces similar to the fingerprint technique was unsatisfactory. Of this type, Scotch tape applied to stained skin was the best. The total number of scars could be recorded but not the depth of the scars. Other unsatisfactory methods using monochrome latex rubber in multiple layers were tried. In these there was little contrast and not enough support for permanent storage, and the process was time consuming. A latex rubber mold using two different colors was unsatisfactory because it was