Composition for forming colored images, new recording material and process using same

摘要

The photochromic activity of triphenylmethane paraamino leuco salts is reversibly inactivated in compositions containing the leuco salt with certain metallic oxides or sulfides. The photochromic properties of the leuco salts are restored by the application of energy, e.g. heat, mechanical pressure, etc. The sensitive compositions containing the leuco salt and metal oxide or sulfide are useful in a process for recording information according to a predetermined pattern by applying a local heat source or local pressure source to a recording material containing a layer of the sensitive composition, the application of energy resulting in the formation of colored marks corresponding to the information to be recorded.