Method of forming an image on a substrate
US10029502B2 · kind B2 · utility
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5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2017 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Aug 14, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M2205/42
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of forming an image on a substrate by applying energy, involves a substrate in or on which there are at least two different colour-change agents, i.e. a first colour-change agent capable of giving rise to at least two different colours; and a second colour-change agent capable of giving rise to at least one different colour than achievable with the first colour change agent. A preferred embodiment of the invention is a multi-layer laminate comprising, in order, a layer comprising the first agent, a barrier layer, and a layer comprising the second agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.