发明名称 Photo-film unit masking material and photo-film unit
摘要 The present invention provides a masking material and a photo-film unit which exhibit writability for any of the presently used writing materials including a ballpoint pen, an oily pen, an aqueous pen, a fountain pen and a pencil, are water-resistant, are free from blocking, and permit complete erasion of pencil writing with a rubber. A writability imparting layer comprising vinylpyrrolidone-vinyl acetate copolymer, an acrylic resin having a hydrophilic group, and powder is provided on a support film of a photo-film unit or a masking material.
申请公布号 US6539179(B2) 申请公布日期 2003.03.25
申请号 US20010932772 申请日期 2001.08.17
申请人 DAI NIPPON PRINTING CO., LTD;FUJI PHOTO FILM CO., LTD. 发明人 HYAKUTOME MASUMI;ONO MINORU
分类号 G03B17/26;(IPC1-7):G03B17/24 主分类号 G03B17/26
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