| 摘要 |
<p>A liquid electrostatic developer containing negatively chargeable resin particles with improved charging characteristics, said developer consisting essentially of (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (B) nonpolar liquid soluble ionic or zwitterionic charge director compound, and (C) resin particles of a polymer containing at least one acidic constituent having a pKa less than 4.5 preferably 3.0. at 25 DEG in water and an acid number due to said acidic constituent of at least one. The average resin particle size by area is less than l0 mu m. Optionally a colorant and other additives or adjuvants are present. The liquid electrostatic developer is useful in copying masking proofs including digital color proofs, lithographic printing plates, and resists. e</p> |
