Vacuum contacting process for photographic elements
US4997735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1989 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Apr 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24405
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process of contacting two photographic elements by juxtaposing the elements and drawing a vacuum between them is described wherein at least one of the elements has been exposed and processed and comprises a support having thereon, as the outermost layer facing the other element, a matte layer comprising matte particles and a polymeric binder. This process is improved by utilizing as the matte layer a layer comprising less than about 1.08 g/m.sup.2 of binder and having matte particles that are present in an amount sufficient and have a mean diameter great enough so that the outermost layer has a roughness measurement, R.sub.a as defined by ANSI Standard B46.1 1985, of greater than about 1.00 microinches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.