Electrostatic liquid developer composition

Claim 1

A LIQUID DEVELOPER COMPOSITION FOR DEVELOPING A LATENT ELECTROSTATIC IMAGE CONSISTING ESSENTIALLY OF POSITIVELY CHARGED, FINELY DIVIDED TONER PARTICLES COMPRISING CARBON BLACK SUSPENDED IN AN INSULATING LIQUID SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOLUENE, XYLENE, CYCLOHEXANE, AND PARAFFIN HYDROCARBONS AND A MIXTURE OF (1) A METAL CATION SALT SELECTED FROM THE GROUP CONSISTING OF TRIVALENT AND TETRAVALENT SALTS OF ALUMINUM, IRON, THORIUM, ZIRCONIUM, LANTHANUM, GERMANIUM, TIN, VANADIUM, THALLIUM, AND AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF OCTOIC, STEARIC, ROSIN, POLYMERIZED ROSIN, NAPHTHENIC, N:TALLOW B-IMINO DIPROPIONIC AND SUCCINIC ACIDS AND (2) AN ORGANIC AMINE, SAID AMINE SELECTED FROM THE GROUP OF N-COCOMORPHOLINE AN IMIDZOLE OF THE FORMULA CH3(CH2)NC3H4N2C2H4OH WHEREIN N IS A POSITIVE INTEGER; TERTIARYL DIMETHYL SOYA AMINE; TALLOW AMINE DIOLEATE; N-LAURYL PROPYLENE DIAMINE; AND A COPOLYMER OF LUARYL METHACRYLATE AND DIETHYLAMONOETHYLMETHACRYLATE: SAID SALT AND AMINE BEING CHEMICALLY NON-REACTIVE IN THE DEVELOPER AND BEING DISSOLVED IN SAID INSULATING LIQUID AT PRINTING TEMPERATURE, SAID INSULATING LIQUID SOLUTION OF (1) AND (2) HAVING A VOLUME RESISTIVITY OF AT LEAST ABOUT 10**9 OHM CENTIMETERS AND DIELECTRIC CONSTANT LESS THAN ABOUT 3.5 SAID SALT AND AMINE BEING PRESENT IN THE AMOUNT EFFECTIVE TO PROVIDE IMPROVED IMAGE DENSITY AND DEFINITION IN DEVELOPED ELECTROSTATIC IMAGES, SAID INSULATING LIQUID BEING PRESENT IN MAJOR AMOUNTS SUFFICIENT TO PROVIDE A FREE FLOWING LIQUID DEVELOPER COMPOSITION.