LIGHT-SHIELDING PAPER

PROBLEM TO BE SOLVED: To obtain such a light-shielding paper that the size of the paper is always kept const. without changing and a photosensitive material such as a photographic film can be stored and transferred without exposure to light till the material is used, by laminating a biaxially orient...

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Bibliographische Detailangaben
Hauptverfasser:	SAJIKI TAKASHI, TOMITA TAKEHITO, FUKUDA AKIO
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AUXILIARY PROCESSES IN PHOTOGRAPHY CINEMATOGRAPHY CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING ELECTROGRAPHY HANDLING THIN OR FILAMENTARY MATERIAL HOLOGRAPHY IMPREGNATING OR COATING OF PAPER LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PACKAGES PACKAGING ELEMENTS PACKING PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS STORING TEXTILES TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain such a light-shielding paper that the size of the paper is always kept const. without changing and a photosensitive material such as a photographic film can be stored and transferred without exposure to light till the material is used, by laminating a biaxially oriented film between a paper base layer and a conductive layer. SOLUTION: A surface varnish layer 1 is formed to protect a printing layer 2. The printing layer 2 is formed to record characters or marks necessary for the function or to raise the value of the product, and a conductive layer 5 is formed by using a conductive ink containing an org. compd. or carbon black. A biaxially oriented film 4 laminated between the paper base layer 3 and the conductive layer 5 is a film having moisture preventing property which does not permeate the water content from inside of the light-shielding paper or does not absorb water content generating from outside. As for the biaxially oriented film 4, a biaxially oriented polyester such as biaxially oriented polyethylene terephthalate, or a biaxially oriented polyethylene such as biaxially oriented polypropylene and biaxially oriented polyethylene are used.