| 摘要 |
Photographic paper which includes, on its reverse side, an impression, the reflecting power of which is less than that of the paper, so as to present a sharp image, but the reflecting power of which is greater than that of a pre-printed reference mark, when it is applied to the paper, so that the impression is not detected by a photoelectric detector used for cutting the paper into individual prints. The impression on the reverse side of the paper is produced by an ink containing a pigment (colouring matter) and a white opaquing agent, such as titanium dioxide or zinc oxide. <IMAGE> |
