Photographic process for etching scribing media

Claim 1

A PROCESS FOR PHOTOCHEMICALLY ETCHING SCRIBING MEDIA HAVING A TRANSPARENT BASE, A TRANSLUCENT SAPONIFIABLE SCRIBING COAT SOLUBILIZABLE BY A SAPONIFYING SOLUTION AND A PHOTOSENSITIVE EMULSION LAYER OF WATER SOLUBLE COLLOID FREE OF HARDENING AGENTS COMPRISING THE STEPS OF PHOTOGRAPHICALLY EXPOSING SAID EMULSION LAYER TO PROVIDE A PHOTOGRAPHIC IMAGE OF AN OBJECT THEREON, PHOTOGRAPHICALLY DEVELOPING AND FIXING SAID EMULSION LAYER WITHOUT INSOLUBILIZING SAID COLLOID, SCRIBING SAID EMULSION LAYER AND SAID SCRIBING COAT TO REMOVE A PORTION THEREOF DEFINED BY AT LEAST A PORTION OF SAID PHOTOGRAPHIC IMAGE THEREON, RESENSITIZING THE REMAINDER OF SAID EMULSION LAYER WITH A SENSITIZER WHICH WILL HARDEN SAID COLLOID ON EXPOSURE TO LIGHT, PHOTOGRAPHICALLY EXPOSING THE RESENSITIZED PORTION OF SAID EMULSION LAYER TO ACTINIC LIGHT TO PROVIDE A PHOTOGRAPHIC IMAGE OF A SECOND OBJECT, SOAKING SAID SCRIBING MEDIA IN AQUEOUS SOLUTION TO SOLUBILIZE AND REMOVE ALL UNEXPOSED PORTIONS OF THE RESENSITIZED EMULSION, SOAKING SAID SCRIBING MEDIA IN A SECOND SOLUTION TO OPERABLY SOLUBILIZE AND REMOVE ALL OF SAID SCRIBING COAT UNCOVERED BY REMOVAL OF SAID EMULSION THEREBY TO YIELD A COMPOSITE IMAGE IN RELIEF ON SAID SCRIBING MEDIA.