Manifold sheet and process of making same

Claim 1

IN THE PROCESS OF PRODUCING A MANIFOLD SHEET COMPRISING THE STEPS OF COATING A SURFACE OF A SIZED SHEET OF PAPER WITH A COLORLESS EMULSION COMTAINING A SUBSTANTIALLY INERT WATER-IMMISCIBLE ORGANIC LIQUID WHICH IS VOLATILE AT ROOM TEMPERATURE, WATER, A WATER-SOLUBLE METALLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEAD, SILVER, STANNOUS TIN AND BISMUTH WHICH COMPOUND IS CAPABLE OF REACTING WITH HYDROGEN SULFIDE GAS TO PRODUCE A DARK COLOR, AND A WATERINSOLUBLE POLYVALENT METAL SALT OF A CARBOXYLIC ACIDS, SELECTED FROM THE GROUP CONSISTING OF THE HIGHER FATTY ACIDS, NAPHTHENIC ACID AND RESIN ACIDS, WHICH LATTER SALT IS INCAPABLE OF PRODUCING A DARK COLOR WITH THIS GAS, THE SAID ORGANIC SOLVENT BEING PRESENT IN AN AMOUNT BY WEIGHT EXCEEDING THAT OF ALL THE OTHER COMPONENTS IN THE EMULSION, THEN CAUSING THIS COATED SHEET TO DRY, THE AMOUNT OF DEPOSITED METALLIC COMPOUNDS BEING SUFFICIENT TO PROVIDE A PRESSURE TRANSFERABLE COATING.