| abstract |
Negative-working electrostatic liquid developer having improved 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) nonpolar liquid soluble ionic or zwitterionic compound, and n (D) a quaternaryammonium hydroxide compound as defined, e.g., tetraethylammonium hydroxide, tetrabutylammonium hydroxide, etc., soluble in an amount of at least 0.5 part per million by weight in the nonpolar liquid. n The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists. |