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EP0302610A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Light sensitive element

Assignee: 3M Co
•
Filing: 1988-07-14
•
Granted: —
•
Expires: 2008-07-14
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Abstract

Abstract A light sensitive, dry processing imaging material comprising imaging material which is substantially free of photosensitive silver compounds as an imaging component of the sheet; said material containing at least one image forming component selected from the group consisting of leuco dyes, bleachable dyes, and coupling compounds. Said imaging system comprising a true dispersion of active particles in a binder. Single layer, single sheet, color imaging elements may be formed by combinations of the particles. The individual particles may be spectrally sensitized to portions of the electromagnetic spectrum including the ultraviolet, visible and infrared regions.

Inventors

  • 👤 Frank T. C/O Minnesota Mining And Sher
  • 👤 Verna J. C/O Minnesota Mining And Lemire
  • 👤 Jeffrey C. C/O Minnesota Mining And Chang

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 03:46
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/02; G03C1/00; G03C1/52; G03C1/72; G03C1/73; G03C1/732; G03C7/46

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 53 words
An imageable particle having maximum dimensions between 0.1 and 100 microns comprising a transparent binder and a light sensitive system selected from a) bleachable dye and photosensitive compounds, b) leuco dyes and photosensitive compounds, and c) couplers and photosensitive initiators, and photosensitive compounds being selected from photosensitive onium salts and photolabile halogen compounds.
Claim 2
Dependent Claim 53 words
An imageable particle having maximum dimensions between 0.1 and 100 microns comprising a transparent binder and a light sensitive system selected from a) bleachable dye and photosensitive compounds, b) leuco dyes and photosensitive compounds, and c) couplers and photosensitive initiators, and photosensitive compounds being selected from photosensitive onium salts and photolabile halogen compounds.
Claim 3
Dependent Claim 20 words
The particle of Claim 1 characterised in that the light sensitive system comprises a leuco dye and a photosensitive compound.
Claim 4
Dependent Claim 15 words
The particle of Claim 2 characterised in that the photosensitive compound comprises an onium salt.
Claim 5
Dependent Claim 23 words
The particle of Claim 3 characterised in that the onium salt is selected from the group consisting of iodonium sulfonium and diazonium salts.
Claim 6
Dependent Claim 17 words
The particle of Claim 4 characterised in that the onium salts are spectrally sensitized by a dye.
Claim 7
Dependent Claim 22 words
The particle of Claims 1, 2, 3 or 4 characterised in that a nitrate ion is present in the light sensitive system.
Claim 8
Dependent Claim 18 words
The particle of Claim 6 characterised in that an organic acid is present in the light sensitive systems.
Claim 9
Dependent Claim 29 words
An imageable layer comprising a multiplicity of the particles as defined in any preceding claim dispersed in a binder which is different from the transparent binder of the particle.
Claim 10
Dependent Claim 61 words
A layer as claimed in Claim 8 containing at least two different types of particles, each type of particle containing different leuco dyes and being spectrally sensitized to different portions of the electromagnetic spectrum each type of particle being capable of generating a color upon exposure which is different from the color generable by another type of particle within said layer.

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