1. A PROCESS FOR PRODUCING A DROP-OUT HALFTONE POSITIVE OF A WASH DRAWING HAVING TONE AND HIGHLIGHT SECTIONS, COMPRISING APPLYING TO THE TONE SECTIONS OF SAID DRAWING A WATER-SOLUBLE THIOCYANATE, THEREAFTER TREATING SAID TONE SECTIONS WITH AN AQUEOUS COPPER SOLUTION WHEREBY TONAL VALUE IS INCREASED, MAKING A NEGATIVE BY EXPOSURE OF SAID DRAWING THROUGH A SCREEN IN PRESENCE OF WHITE LIGHT, THEN IN THE SAME POSITION, TO LIGHT PASSING THROUGH A COMBINATION OF LIGHT BLUE AND YELLOW FILTERS IN THE ABSENCE OF SAID SCREEN, WHEREUPON DROP-OUT OCCURS ONLY IN THE HIGHLIGHT SECTIONS, AND PREPARING A POSITIVE FROM SAID NEGATIVE.