HEATER OF INVISIBLE INFORMATION PRINTING SHEET, PRINTER EQUIPPED WITH HEATER AND INSPECTION METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an inspection method for facilitating check of a printing position and ink attaching amount in an invisible information printing sheet using scratch color developing ink containing an electron-donating dye precursor, an electronic compound and varnish.

SOLUTION: A heater of the invisible information printing sheet, which is attached to a printer for manufacturing the invisible information printing sheet by providing an invisible printing part by color developing ink containing the electron-donating dye precursor, the electronic accepting compound and the varnish on the same surface of a support and which can heat the invisible printing part during transportation, is provided. Further an printer equipped with the heater and the inspection method using the same are also provided.

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