| 摘要 |
1,155,747. Electro-photographic materials. RANK XEROX Ltd. Sept.27, 1966 [Oct. 1, 1965], No.43089/66. Heading G2H. [Also in Division H1] Photo-conductive particles for xerographic plates and the photo-electrophoretic process of Specification 1, 124, 625 comprise a lake of a 3, 6 bis (amino)-9-2'-carboxy phenyl xanthenonium salt. The sodium, barium, phosphotungstic, phosphomolybdic or phosphotungstomolybdic salts are preferred. |
