Sensitized sheets for screen reflectography

Claim 1

A SENSITIZED DIAZOTYPE SHEET FOR SCREEN REFLECTOGRAPHY COMPRISING, AS A UNITARY FLEXIBLE SHEET STRUCTURE, A FLEXIBLE BASE FILM SENSITIZED OVER ONE SIDE WITH A POSITIVE-PRINTING DIAZO LAYER AND TRANSPARENT TO THE LIGHT TO WHICH SAID LAYER IS SENSITIVE, AND A RELATIVELY THIN FLIXIBLE SKIN OVERLYING THE SENSITIZED SIDE AND JOINED FIRMLY THERETO OVER SUBSTANTIALLY THE WHOLE SURFACE THEREOF SO THAT THE BASE FILM AND SKIN DO NOT SEPARATE IN HANDLING OR EXPOSING THE SHEET, SAID SKIN COMPRISING AN INTEGRAL LIGHT- ACREEN WHICH AT LEAST NEARLY CONTACTS THE LIGHT-SENSITIVE LAYER AND CONSISTIS OF A MYRIAD OF MINUTE AREAS OPAQUE TO SAID LIGHT INTERSPERSED WITH MINUTE AREAS TRANSPARENT THERETO WITHOUT INTERMEDIATE GRADATED TRANSITIONS, THE JUNCTION BETWEEN THE SKIN AND THE BASE FILM BEING FRANGIBLE SO THAT THE SKIN IS STRIPPABLE TO YIELD THE BASE FILM AS A SCREENLESS EXPOSURE.