Novel correction compositions and process for using same
US4732614A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1985 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Jul 15, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/128
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Correction compositions for correcting markings provided on the surface of a pressure-sensitive chemical recording medium carrying a developer material which comprises an acidic developer by interaction of the developer material with a color-providing material. The compositions comprise a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming material, and a Lewis acid. The composition is applied to a marking to provide a film which covers the marking, and a visible correcting marking can be provided on the film by applying a pattern of color-providing material corresponding to the corrected marking to the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.