VARNISH FOR DETECTING MARK IN OHP SHEET

PROBLEM TO BE SOLVED: To obtain a varnish for a detecting mark in an OHP sheet, useful for forming a detecting mark which is excellent in opacifying properties and can be decolored in such a degree as not to be an eyesore when the varnish is formed into an image on the surface of an OHP sheet (over...

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Bibliographische Detailangaben
Hauptverfasser: HOSHINO MITSUHIDE, TAKANO MASAHIDE
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To obtain a varnish for a detecting mark in an OHP sheet, useful for forming a detecting mark which is excellent in opacifying properties and can be decolored in such a degree as not to be an eyesore when the varnish is formed into an image on the surface of an OHP sheet (over head projector) by an image forming machine such as an electrophotographic copying machine or a laser beam printer and made transparent. SOLUTION: In an OHP sheet 1 in which a toner receiving layer 3 is laminated to at least one side of a substrate 2 and an image is formed on the toner receiving layer 3 by an image forming machine, this varnish for a detecting mark, constituting a detecting mark 4 to be made transparent by heat in passing through a heat fixation roll of the image forming machine, is obtained by blending a hollow plastic pigment comprising a shell part which is composed of a styrene-acrylic resin making a masking agent and has 35-5O deg.C Tg and an aqueous polyester resin and/or an aqueous acrylic resin having 30-6O deg.C Tg making a binder in the solid content ratio of 95:5 to 65:35.