Processes of precipitating copper from copper sulfate solutions and precipitating media for so doing

Claim 1

A CONTINUOUS METHOD OF PRODUCING SILVERED MIRRORS, WHICH COMPRISES CONTINUOUSLY MOVING PLATES OF GLASS, CONTINUOUSLY APPLYING TO ONE SIDE OF EACH PLATE A SILVER SALT AND A REDUCING AGENT TO FORM A SILVER SURFACE WHILE PLATE, CONTINUOUSLY APPLYING TO SAID SILVER SURFACE WHILE IT IS STILL WET A SPRAY OF AQUEOUS COPPER SULFATE SOLUTION HAVING A PH OF FROM 0.8 TO 1.2, SAID SOLUTION HAVING A CONCENTRATION OF APPROXIMATELY 0.1% TO 0.2% COPPER SULFATE, AND A SUSPENSION OF COPPER-COATED FINELY DIVIDE IRON PARTICLES, SAID PARTICLES HAVING A SIZE WITHIN THE RANGE OF FROM 0.1 TO 0.005 MM., SAID SUSPENSION HAVING A CONCENTRATION OF ABOUT 2% TO ABOUT 4% OF SAID COPPER-COATED IRON PARTICLES AND ALSO CONTAINING ABOUT 0.0002% HYDRAZINE, ABOUT 0.001% FORMALDEHYDE AND ABOUT 0.001% TRIETHANOLAMINE, THE SAID SUSPENSION AND SAID SOLUTION OF COPPER SULFATE BEING SPRAYED IN APPROXIMATELY EQUAL AMOUNTS AND THE RESULTING MIXTURE DEPOSITED ON THE SAID SILVER SURFACE THUS FORMING A LAYER OF COPPER ON SAID SILVER SURFACE.