Reference

Electrophotographic toner kit and full color image forming apparatus

Electrophotographic toner kit and full color image forming apparatus. Masuda, Minoru; Tomita, Masami; Yamada, Hiroshi; Suzuki, Tomomi ( Ricoh Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 2005010274 A2 13 Jan 2005, 25 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: G03G009-09. ICS: G03G015-01; G03G015-08. APPLICATION: JP 2003-172079 17 Jun 2003. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) The kit comprises cyan (C), magenta (M), and yellow (Y) toners and an addnl. black toner contg. at least a colorant and a binder, which form the following image colors (1) to (4) on paper type-1, 2, 3, and 4 standardized by ISO 12647-2 (1996) with a single toner, resp.: (1) having (C) color difference (DE) ￡5.0 to L* = 54.0, a* = -37.0, and b* = -50.0, (M) DE ￡8.0 to L* = 47.0, a* = 75.0, and b* = -6.0, and (Y) DE ￡6.0 to L* = 88.0, a* = -6.0, and b* = 95.0; (2) having (C) DE ￡5.0 to L* = 54.0, a* = -33.0, and b* = -49.0, (M) DE ￡8.0 to L* = 47.0, a* = 72.0, and b* = -3.0, and (Y) DE ￡6.0 to L* = 88.0, a* = -5.0, and b* = 90.0; (3) having (C) DE ￡5.0 to L* = 54.0, a* = -37.0, and b* = -50.0, (M) DE ￡8.0 to L* = 47.0, a* = 71.0, and b* = -2.0, and (Y) DE ￡6.0 to L* = 82.0, a* = -6.0, and b* = 86.0; and (4) having (C) DE ￡5. 99402-80-9 and 6358-31-2 which are cas registry numbers of chemicals are mentioned.0 to L* = 62.0, a* = -23.0, and b* = -39.0, (M) DE ￡8.0 to L* = 53.0, a* = -56.0, and b* = -2.0, and (Y) DE ￡6.0 to L* = 86.0, a* = -4.0, and b* = 68.0. The app. using the toners forms cyan, magenta, and yellow area images defined as the above. The kit shows the same color reprodn. as that of std. offset printing. .