INK FOR SCRATCH-PRINTING AND SCRATCH-PRINTED MATTER

PROBLEM TO BE SOLVED: To provide an ink for scratch-printing, capable of holding a concealing property against the light of a specific light source, e.g., black light, simple in the constitution, producible in a few steps and easy to produce, and to provide scratch-printed matter.SOLUTION: This ink...

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Bibliographische Detailangaben
Hauptverfasser:	MURASE SHINICHI, YUGAWA HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BOOK COVERS BOOKBINDING CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COLOUR PRINTING CORRECTING FLUIDS DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR DYES FILES FILLING PASTES INKS LINING MACHINES LOOSE LEAVES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MOVABLE-STRIP WRITING OR READING APPARATUS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES SPECIAL PRINTED MATTER STAMPS TRANSPORTING TYPEWRITERS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an ink for scratch-printing, capable of holding a concealing property against the light of a specific light source, e.g., black light, simple in the constitution, producible in a few steps and easy to produce, and to provide scratch-printed matter.SOLUTION: This ink for scratch-printing contains a substance having, in an ink base agent for offset-printing, a wider band gap than that of the energy of irradiation light, e.g., a substance having a band gap of >4.1 eV and ≤20 eV, or a substance having a band gap of >4.88 eV and ≤20 eV. Concretely, as such substances, magnesium oxide, tantalum oxide, calcium oxide, lithium fluoride and sodium chloride are suitable. The scratch-printed matter 10 is provided by applying the ink for scratch-printing onto a printing substrate material and installing a printing layer 13 for forming concealed characters 12 as a concealed image.