| abstract |
Electrostatic liquid developer having improved negative charging characteristics consisting essentially of n (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, n (B) thermoplastic resin particles having an average by area particle size of less than 10 μm, n (C) charge director compound, and n (D) at least one soluble solid or liquid organic monofunctional amine compound of the formula: R n NH 3-n wherein R is alkyl, cycloalkyl or alkylene, or substituted alkyl, the alkyl, cycloalkyl, alkylene or substituted alkyl group being of 1 to 50 carbon atoms, and n is an integer of 1 to 3. n Optionally, a colorant, e.g., a pigment; metallic soap, adjuvant can be present. The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists. |