Electrically stabilized liquid toners

A liquid toner for electrostatic imaging which comprises insulating non-polar carrier liquid, colorant particles, at least one charge director other than an amine salt, and at least one stabilizing component in an amount effective to stabilize the electrical properties of said at least one charge director, said stabilizing component being selected from non-quaternary amine salts and being soluble in the carrier.

A liquid toner for electrostatic imaging which comprises thermoplastic resin particles dispersed in an insulating non-polar carrier liquid having a volume resistivity above 10.sup.9 ohm-cm and a dielectric constant below 3.0;

• colorant particles micro-dispersed in said carrier liquid;
• at least one charge director other than an amine salt;
• and at least one stabilizing component in an amount effective to stabilize the electrical properties of said at least one charge director, said stabilizing component being selected from non-quaternary salts of aliphatic amines with an acid selected from inorganic acids and alkyl-substituted aromatic sulfonic acids, and being soluble in the carrier.

An electrostatic imaging process which comprises the steps of:

• forming a charged latent electrostatic image on a photoconductive surface;
• applying to said surface charged colorant particles from a toner composition which comprises insulating non-polar carrier liquid, colorant particles, at least one charge director other than an amine salt and at least one stabilizing component in an amount effective to stabilize the electrical properties of said at least one charge director, said stabilizing component being selected from non-quaternary amine salts and being soluble in the carrier;
• and transferring the resulting toner image to a substrate.