| 摘要 |
<p>Electrophotographic process comprises forming an image by means of electrically photosensitive particles of an opt. substd. triphenodioxazine, pref. 2,9-dibenzoyl-6,13-dichloro-triphenodioxazine or 2,9-diacetyl-6,13-dichloro-triphenodioxazine. These cpds. show the required spectral response for forming a pigment mixture in a liquid vehicle for the formation of coloured images.</p> |
