Inorganic metal salt as adjuvant for negative liquid electrostatic developers
US4758494A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Feb 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/135
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Negative, liquid electrostatic developer consisting essentially of PA1 (A) nonpolar liquid having Kauri-butanol value less than 30, present in major amount, PA1 (B) thermoplastic resin particles having a colorant and an inorganic metal salt as defined dispersed therein and average particle size by area being less than 10 .mu.m, and PA1 (C) nonpolar liquid soluble ionic or zwitterionic compound which imparts a negative charge to the thermoplastic resin particles. Optionally additional adjuvants are present. The liquid electrostatic developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.