Abstract: laser carving seals and 5 mold pressing seals from“the same printing plate”were manufactured for this study It was found that individual differences of seals were very minor If the setting conditions of pressure, paint, paper and underlay were considered, the discrimination of imprints of different seals from “the same printing plate”was very difficult, if not impossible

Key words: Chinese seals, imprint, laser engrave, mold press, seal identification