Use of direct thermal transparent imaging materials including an organic silver salt for producing labels
US6403527B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/4989
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for using a substantially light-insensitive mono sheet direct thermal imaging material for producing a non-retro-reflective readable object attachable to a second object for information purposes, the imaging material including a support, a thermosensitive element and an attaching layer, wherein the thermosensitive element contains a substantially light-insensitive organic silver salt, a reducing agent therefore in thermal working relationship therewith, a binder and does not contain a di- or triarylmethane dye precursor compound possessing within its di- or triarylmethane structure an aryl group substituted in the ortho position to the meso carbon atom with an S-containing moiety ring-closed on the meso carbon atom selected from a thiolactone, dithiolactone and thioether moiety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.