Detail of "2654-57-1"

Reference

Manufacture of lithographic plate using DTR (Diffusion transfer reversal) process

Manufacture of lithographic plate using DTR (Diffusion transfer reversal) process. Vaes, Jos; Wabbes, Luc (Agfa-Gevaert N. V., Belg.In this study， 50-81-7 and 2654-57-1 are also used.). Jpn. Kokai Tokkyo Koho JP 08234436 A2 13 Sep 1996 Heisei, 9 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: G03F007-07. ICS: G03C008-36. APPLICATION: JP 1995-350032 25 Dec 1995. PRIORITY: EP 1994-203778 28 Dec 1994. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) The lithog. plate is developed by an alkali developer contg. 0.1 mol/L ascorbic acid, 0.015 mol/L 1-phenyl-3-pyrazolidone deriv., and 0.003 mol/L thiosulfate. The lithog. plate shows improved sensitometry. .

Photographic silver complex diffusion transfer reversal process

Photographic silver complex diffusion transfer reversal process. Vermeulen, Leon Louis; Ghys, Theofiel Hubert; De Smedt, Willy Paul; Vervloet, Ludovicus Hendrik; Callant, Paul Remi (Agfa-Gevaert N. V., Belg.). Eur. Pat. Appl. EP 197202 A1 15 Oct 1986, 17 pp. DESIGNATED STATES: R: AT, BE, CH, DE, FR, GB, IT, LI, LU, NL, SE. (European Patent Organization) CODEN: EPXXDW. CLASS: ICM: G03C005-54. ICS: G03C001-16. APPLICATION: EP 85-200546 9 Apr 1985. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) A photog. Ag complex diffusion-transfer reversal process employs a Ag halide emulsion contg. Ag halide grains including 370 mol% AgCl and being spectrally sensitized with 31 dye of the formula I [R, R1 = (substituted) alkyl; X- = anion] which provides to the Ag halide emulsion a spectral sensitivity mainly in the range of 400-500 nm and does not extend the spectral sensitivity substantially beyond 500 nm so that the processing of the Ag halide emulsion can be carried out under yellow safelight conditions. Thus, a Ag(Br,Cl) (Cl 98.2 mol.%) emulsion contg. I (R, R1 = Et; X- = p-sulfotolyl), hydroquinone, 1-phenyl-4-methyl-3-pyrazolidinone, and common stabilizing agents was coated on the gelatin-C black antihalation layer formed on a polyethylene-coated paper support, exposed with respect to a continuous tone black-and-white original combined for direct screening with a contact screen under yellow safelight conditions and introduced under the yellow safelight conditions with an image-receiving sheet contg. Ag2S phys. development nuclei into a diffusion-transfer processing app. contg. a liq. processing soln. contg. 2654-57-1 and 123-31-9 are just another two chemicals used in this study. KBr, Na2SO3, NaCNS, 1-phenyl-5-mercaptotetrazole, and Na3PO4 to give a pos. print composed of screen dots having a very high accutance and showing in the background no dye stain or other visible fog. .