Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Method of use – kit – or combined with marking instrument or...
Patent
1994-09-06
1995-06-20
Hess, B. Hamilton
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Method of use, kit, or combined with marking instrument or...
503202, 503215, 503216, 503217, 503218, B41M 5136
Patent
active
054260850
ABSTRACT:
This invention relates to improved imaging systems based on the formation of yellow colored coordination compounds of transition metals with certain ligands. These coordination compounds have been found to provide excellent yellow colors when used in pressure sensitive carbonless copy-papers wherein the image is formed by the reaction of a color-forming compound with transition metal salts such as those of nickel, cobalt, iron, copper, and similar materials. These yellow color-formers have the advantage of high solubility in encapsulation solvents and have less color on Zn.sup.2+ containing CB sheets. Use of these yellow color-formers with other metal complex color-formers such as N-(monosubstituted)dithiooxamide color-formers and N,N'-(disubstituted)dithiooxamides results in the formation of black images.
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Albin Loren D.
Jacobson Martha
Olson David B.
Evearitt Gregory A.
Griswold Gary L.
Hess B. Hamilton
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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