EP 0076342 A1 19830413 - A color-developer sheet for carbonless copying.
Title (en)
A color-developer sheet for carbonless copying.
Title (de)
Farbentwicklungsfolie für Aufzeichnungssysteme ohne Kohle.
Title (fr)
Feuille de développement chromogène pour l'enregistrement sans carbone.
Publication
Application
Priority
EP 81304550 A 19811001
Abstract (en)
A color-developer sheet or set for carbonless copying comprising, in combination, microcapsules containing an electron-donative, colorless organic compound and an activated clay capable of developing a color upon absorption of said organic compound, characterised in that a coating liquid is used comprising an activated clay in solid particulate form which has been admixed in advance with sodium silicate and optionally one or more other dispersants.
IPC 1-7
IPC 8 full level
B41M 5/155 (2006.01)
CPC (source: EP)
B41M 5/1555 (2013.01)
Citation (search report)
- GB 760080 A 19561031 - NCR CO
- GB 2050407 A 19810107 - MITSUBISHI PAPER MILLS LTD
- DE 1001292 C
- US 3434864 A 19690325 - HADEN WALTER L JR, et al
- DE 1152429 B 19630808 - NCR CO
- US 3223546 A 19651214 - HEMSTOCK GLEN A
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 81304550 A 19811001