Process for the production of a photographic image
US6033832A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1992 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Jul 20, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/145
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A process for the production of a photographic image, in particular an ID card, using a color photographic silver halide material on a reflective support having a zone I in which information is recorded in the form of a colored image and a zone II in which data readable by infra-red light are recorded, comprising the following processing steps: PA1 a) exposure, PA1 b) development with a color developer, PA1 c) treatment with H.sub.2 O.sub.2 or a compound releasing H.sub.2 O.sub.2, PA1 d) fixing without prior or concomitant bleaching, PA1 e) washing or stabilizing and PA1 f) drying, in which steps (b) and (c) may be combined to a single step, results in a clear color image as well as a silver image which is reliably legible under IR light if steps (a) and (b) are carried out in such a manner that the silver maximum density in zone II after processing is at least 0.35, preferably not less than 0.5, measured under reflection at 850 nm, and the silver maximum density in zone I after processing is at most 0.5 in areas having a neutral color density of not more than 1.5 and at most 0.4 in areas having a yellow, magenta or cyan color separation density of not more than 1.5, measured under…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.