EP 0420674 B1 19941228 - Image forming method on heat-sensitive recording material.
Title (en)
Image forming method on heat-sensitive recording material.
Title (de)
Verfahren zur Bildformung auf wärmeempfindlichem Aufzeichnungsmaterial.
Title (fr)
Méthode pour former des images sur des matériaux d'enregistrement thermosensibles.
Publication
Application
Priority
- JP 21849990 A 19900820
- JP 25326189 A 19890928
Abstract (en)
[origin: EP0420674A1] A recording material is prepared having a support (e.g., of paper and/or a polymer) on which is a layer containing polymeric (e.g., polyurea) microcapsules preferably of Tg 80 to 150 DEG C containing a light-absorbent (preferably carbon black in a coverage of 0.1 to 10 g/m<2>, optionally with a dye or pigment), a polymeric binder and an oil-soluble solvent. The recording material is placed or wrapped around, a heated roller and heated to 10 to 50 DEG C below the Tg of the microcapsules whilst being patternwise irradiated with a laser beam which makes the capsules walls more easily broken; the image-receiving film is then wrapped around the irradiated material and pressure of 40 to 490 Pa x 10<5> exerted, whereby a visible negative image of the light-absorbent and binder is formed on the image-receiving film. If the receiving film is transparent, both films can be initially placed in contact and exposure made through the receiving film with a beam focussed on the film interface; and a positive image is then also formed in the receiving film. The method gives a good image of high density using a low-power laser.
IPC 1-7
IPC 8 full level
B41M 5/28 (2006.01)
CPC (source: EP)
B41M 5/287 (2013.01)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 0420674 A1 19910403; EP 0420674 B1 19941228; DE 69015539 D1 19950209; DE 69015539 T2 19950803
DOCDB simple family (application)
EP 90310652 A 19900928; DE 69015539 T 19900928