CA1190987A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Process and compositions for printing in multiple layers
Assignee: Individual
•
Filing: 1984-05-23
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Granted: 1985-07-23
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Expires: 2004-05-23
Abstract
Abstract ABSTRACT Printed materials such as tickets, lottery forms, cards and contest forms, bearing a hidden message which is revealable by scratching off a covering opaque layer, are prepared by printing, preferably lithographically, a message with a dark coloured pigmented varnish-ink, covering the printed message with another layer of differently coloured varnish-ink and then printing i.e. lithographically a hiding coat over the pigmented varnish-ink layer. The pigmented varnish ink formulation and the hiding coat layer are both based upon compatible, preferably the same, film-forming resin systems and are deposited from a common solvent.
Inventors
- 👤 Eli Ganho
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-01 20:24
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
116 words
A process for removably masking indicia on a printable substrate, which comprises: applying to the substrate and over the indicia, at least one layer of pigmented varnish-ink formulation whereby said at least one layer completely covers the area defined by said indicia, allowing said at least one layer to dry and cure to form a film overlying said indicia but through which said indicia are legible, applying at least one hiding layer over said area, allowing said at least one hiding layer to dry and cure to form an opaque, abrasion-removable mask over said area, the film-forming resin system of the pigmented varnish being substantially compatible with the film forming resin system of the hiding coat.
Claim 2
Dependent Claim
116 words
A process for removably masking indicia on a printable substrate, which comprises: applying to the substrate and over the indicia, at least one layer of pigmented varnish-ink formulation whereby said at least one layer completely covers the area defined by said indicia, allowing said at least one layer to dry and cure to form a film overlying said indicia but through which said indicia are legible, applying at least one hiding layer over said area, allowing said at least one hiding layer to dry and cure to form an opaque, abrasion-removable mask over said area, the film-forming resin system of the pigmented varnish being substantially compatible with the film forming resin system of the hiding coat.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said pigmented varnish-ink formulation is used to print said indicia on said substrate.
Claim 4
Dependent Claim
27 words
The process of claim 2 wherein the pigmented varnish-ink formulation and the hiding coat are both lithographically applied as liquid solutions or slurries in a common solvent.
Claim 5
Dependent Claim
20 words
The process of claim 3 wherein the pigmented varnish and the hiding coat include the same film forming resin system.
Claim 6
Dependent Claim
32 words
The process of claim 4 wherein the pigmented varnish and the hiding coat both include curatives for said resin system, the varnish including a larger amount of curative than the hiding coat.
Claim 7
Dependent Claim
14 words
The process of claim 5 wherein the resin system includes phenolic modified rosin ester.
Claim 8
Dependent Claim
11 words
The process of claim 4 wherein the varnish contains a wax.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein the hiding coat contains an unsaturated oil.
Claim 10
Dependent Claim
14 words
The process of claim 8 wherein the resin system also includes linseed-isophthalic alkyd resin.
Claim 11
Dependent Claim
12 words
The process of claim 9 wherein the hiding coat includes powdered aluminum.
Claim 12
Dependent Claim
15 words
The process of claim 10 wherein the hiding coat includes a long chain fatty amide.
Claim 13
Dependent Claim
24 words
The process of claim 11 wherein the long chain fatty amide is selected from the group consisting of erucamide, erucyl stearamide and erucyl erucamide.
Claim 14
Dependent Claim
68 words
A pigmented varnish formulation for use in lithography comprising an ink known for use in lithographic printing in admixture with a varnish of the formula: COMPONENTS % RANGE Ma g i e oil (solvent) 30-35 Phenolic modified rosin ester 16-20 Hydrocarbon resin 13-17 Linseed isophthalic alkyd 10-13 Hydrocarbon plasticizer 7-10 Montan Wax 3-6 Calcium perborate 1.5-3 Manganese octoate 1.5-2 Cobalt octoate 0.5-1 Gelling agent 0.5-0.7 Chinawood oil 0.3-0.5
Claim 15
Dependent Claim
68 words
A pigmented varnish formulation for use in lithography comprising an ink known for use in lithographic printing in admixture with a varnish of the formula: COMPONENTS % RANGE Ma g i e oil (solvent) 30-35 Phenolic modified rosin ester 16-20 Hydrocarbon resin 13-17 Linseed isophthalic alkyd 10-13 Hydrocarbon plasticizer 7-10 Montan Wax 3-6 Calcium perborate 1.5-3 Manganese octoate 1.5-2 Cobalt octoate 0.5-1 Gelling agent 0.5-0.7 Chinawood oil 0.3-0.5
Claim 16
Dependent Claim
22 words
The formulation of claim 13 wherein said varnish formulation is 15-25% by volume of the total volume of the pigmented varnish formulation.
Claim 17
Dependent Claim
29 words
The formulation of claim 13, or claim 14 wherein there is incorporated at least one species of long chain fatty amides selected from erucamide, erucyl stearamide and erucyl erucamide.
References Cited (Backward Citations)
No citation records indexed.
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