Method of producing printing forms for intaglio printing

Claim 1

IN THE METHOD OF PRODUCING AN INTAGLIO PRINTING SURFACE FROM AN ORIGINAL HAVING A RANG OF TONE VALUES, THE STEPS COMPRISING (A) MAKING A SCREENED DIAPOSITIVE FROM SAID ORIGINAL REPRODUCTION, SAID DIAPOSITIVE HAVING THE FULL RANGE OF TONE VALUES PRESENT IN THE ORIGINAL SUFICIENT FOR MAKING A PROOF PRINT BY THE OFFSET PROCESS, (B) PRINTING BY OFFSET A PROOF OF SAID DIAPOSITIVE, (C) RETOUCHING THE DIAPOSITIVE TO CORRECT THE TONE VALUE THEREOF AS INDICATED BY THE OFFSTET PROOF, (D) THEN TRANSFERRING THE CONFIGURATION OF THE SCREENED DIAPOSITIVE ONTO A PRINTING SURFACE TO BE RELIEVED IN THE IMAGE AREA FOR INTAGLIO PRINTING, (E) FORMING ON SAID PRINTING SURFACE A DOCTOR BAR FORMING SECOND SCREEN CONFIGURATION HAS A DOCTOR BAR FORMING AREA AMOUNTING TO NO MORE THAN TWOTHIRDS OF THE TOTAL PRINTING SURFACE AREA, AND (F) RELIEVING THE PRINTING SURFACES TO FORM INK RECEPTIVE WELLS THEREIN ACCORDING TO THE COMBINED CONFIGURATIONS PRODUCED IN STEPS (D) AND (E).