Imaging particulates, paper and process, and imaging of paper using dual wavelength light
US8980523B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2013 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Nov 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2250/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides dual wavelength imaging compositions, processes for forming dual wavelength imaging compositions, methods for forming images using dual wavelength imaging compositions and substrate (e.g., paper web) treated (e.g., coated) on one or both sides with dual wavelength imaging compositions. Also provided is a dual wavelength imaging particulate comprising a matrix of polymer material and containing: one or more image-forming agents; a photo-oxidizing agent which is activated at a first wavelength of light to cause the one or more image-forming agents to form one or more images; and a reducing agent which is activated at a second wavelength of light to cause termination of the formation of the one or more images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.