A transparent image sheet carrier for overhead-projection systems is described based upon a dark-tone colored field with image markings in bright-tone contrasting colors, including a sheet bearing a layer containing at least one acid-resistant dye for imparting the dark-tone color to the field; the dye may be discharged in the locale of the image markings by a discharge device with a simultaneous appearance in the image locale of the bright-tone contrasting color.
申请公布号
EP0016407(B1)
申请公布日期
1983.10.26
申请号
EP19800101261
申请日期
1980.03.12
申请人
PELIKAN AKTIENGESELLSCHAFT
发明人
MECKE, NORBERT, DR. DIPL.-CHEM.;SCHMITT, FRANZ-ULLRICH, DR. DIPL.-CHEM.;SCHRADER, KARL-HEINZ;BUTSCHKAU, HEINKE (GEB. WOLF)