COPY SHIELD COMPOSITION AND COPY SHIELD TAPE
PROBLEM TO BE SOLVED: To remove a coated copy shield composition easily by adding a coloring matter absorbing light of specified wavelength from the light source of a copy machine to cause variation in the intensity of reflected light, and a binder for shaping the coloring matter thereby making impo...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PROBLEM TO BE SOLVED: To remove a coated copy shield composition easily by adding a coloring matter absorbing light of specified wavelength from the light source of a copy machine to cause variation in the intensity of reflected light, and a binder for shaping the coloring matter thereby making impossible to read out a copy while allowing visual read out of an object to be copied. SOLUTION: Copy shielding can be performed using a specific coloring materials of yellow red-red-violet, i.e., a coloring matter absorbing light of specified wavelength, and an ordinary water-color or an oil-color pen such that a conspicuous intensity variation takes place in the reflected light of a copy machine. In order to remove a coated coloring material, a copy shield composition not in the form of a liquid composition impregnating fibers but in the form of a solid composition is mounted, in the form of a thin film, on the surface of a document and boded thereto. When it is removed, the film is stripped off the document using a rubber eraser or the like. Alternatively, the copy shield compound may be provided in the form of a filmable composition using a binder, e.g. a resin wax. |
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