Lithographic printing plate

Claim 1

A PLANOGRAPHIC PRINTING PLATE COMPRISING AN UNBACKED, SINGLE-PLY, UNSIZED SHEET OF UNCALENDERED AMYLOID PARCHMENT PAPER HAVING A MINUTELY FIBROUS FINE GRAIN SURFACE CHARACTERIZED BY LOW GLASS AND LOW SMOOTHNESS VALUES AND HAVING ITS NON-IMAGE AREA COATED WITH AN INKREPELLENT DAMPENING SOLUTION COMPOSED OF AN AQUEOUS SOLUTION OF GLYCERINE, SODIUM SULFATE, BORIC ACID AND GUM ACACIA IN THE PROPORTIONS OF FROM APPROXIMATELY 12.8 OUNCES TO APPROXIMATELY 64 OUNCES BY VOLUME OF GLYCERINE, FROM APPROXIMATELY 1 TO APPROXIMATELY 16 OUNCES OF SODIUM SULFATE, FROM APPROXIMATELY 1 TO APPROXIMATELY 6 OUNCES OF BORIC ACID, AND FROM APPROXIMATELY 1/4 OUNCE TO APPROXIMATELY 3 OUNCES OF GUM ACACIA, THE FOREGOING PROPORTIONS BEING FOR ONE GALLON SOLUTION, SAID DAMPENING SOLUTION PRODUCING A NON-PENETRATING AND NON-SATURATING FILM ON THE NON IMAGE AREA OF THE PLATE, WHEREBY STRETCHING, WRINKLING OR TEARING OF THE PLATE IS PREVENTED.