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51. 发明专利

DE1266642B 未知
公开(公告)号：DE1266642B
公开(公告)日：1968-04-18
申请号：DEE0027774
申请日：1964-09-15
申请人： EASTMAN KODAK CO
发明人： COWDEN HERBERT BAYLEY
IPC分类号： G03C5/32 , G03C5/38 , G03C8/02 , G03C8/06
摘要： 1,64,106. Desensitizing baths. EASTMAN KODAK CO. Sept.23, 1964 [Sept. 23, 1963], No. 41183/66. Divided out of 1, 064, 105. Heading G2C. A desensitizing bath for use in the process of Specification 1, 064,105 comprises an alkaline aqueous solution containing between 0À1 and 0À5 gms/litre of a 2, 2'-azo pyridine e. g. 2, 2'- azopyridine itself, 5-chloro-2, 2'-azopyridine or carboxyl or sulpho substituted 2, 2'-azopyridines and sufficient added material e. g. 2-diethylaminoethanol and sodium bicarbonate to raise the PH above that due to the presence of the 2, 2'-azopyridine alone. The solution may contain a silver halide developing agent and tetrasodium E. D. T. A.

52. 发明专利

GB1109234A Improvements in and relating to the de-watering of sewage sludge 未知
公开(公告)号：GB1109234A
公开(公告)日：1968-04-10
申请号：GB1596665
申请日：1965-04-14
申请人： SYDNEY FRANCIS WILLIAM CRUNDAL , ARTHUR ROBERT CRUNDALL , MARTIN LAWRENCE CRUNDALL
IPC分类号： C02F11/12 , G03C5/32
摘要： 1,109,234. Filter. S. F. W. CRUNDALL, A. R. CRUNDALL and M. L. CRUNDALL. 13 April, 1966 [14 April, 1965], No. 15966/65. Addition to 969768. Heading B1D. The method and apparatus of Specification 969,768 are modified by making the perforate member (2) on which the solids of the sewage sludge are left of expanded metal.

53. 发明专利

FR1021725A 未知
公开(公告)号：FR1021725A
公开(公告)日：1953-02-23
申请号：FR1021725D
申请日：1950-07-10
申请人： GEVAERT PHOTO PROD NV
IPC分类号： G03C5/32

54. 发明专利

FR950281A 未知
公开(公告)号：FR950281A
公开(公告)日：1949-09-22
申请号：FR950281D
申请日：1946-08-28
申请人： KODAK PATHE
IPC分类号： G03C5/32
摘要： 586,782. Intensifying photographic latent images. KODAK, Ltd. (Eastman Kodak Co., Weyerts, W. J., and Wiederhold, C. W.). Nov. 8, 1944, No. 21984. Addition to 570,703. [Class 98 (ii)] Intensification of a latent image in an exposed gelatino silver halide emulsion layer is produced by treatment of the layer subsequent to the exposure but prior to development with a solution containing sulphurous acid but free of developing agent, by removal uniformly of the unabsorbed solution without removal of the absorbed solution, and by storing the layer in air allowed to circulate freely over it for at least five minutes. A solution of sulphurous acid, sodium bisulphite, or potassium metabisulphite may be used, and should have a pH below 6. The colour sensitivity of the emulsion is not removed. The excess liquid may be removed by an air squeegee or wiping. The air may be allowed to circulate for 10 to 20 minutes. The sulphurous acid bath should not contain developing agents acting as antioxidants such as hydroquinone or iso-ascorbic acid. In examples, comparative figures are given for the speed, gamma and density of support plus fog, using a metol-hydroquinoneboric acid-borax developer with pre-treatments in distilled water, sodium bisulphite solution and potassium metabisulphite solution. Intensification of the latent image by exposure to ammonia vapour, by exposure to the radiation of a safelight, by subjection to the action of heat and humidity and by treatment with sulphur dioxide is referred to. Specification 510,808 is referred to.

55. 发明专利

GB586782A Improvements relating to photographic materials 未知
公开(公告)号：GB586782A
公开(公告)日：1947-03-31
申请号：GB2198444
申请日：1944-11-08
申请人： EASTMAN KODAK CO , WALTER JOHN WEYERTS , CHARLES WALTER WIEDERHOLD
IPC分类号： G03C5/32
摘要： 586,782. Intensifying photographic latent images. KODAK, Ltd. (Eastman Kodak Co., Weyerts, W. J., and Wiederhold, C. W.). Nov. 8, 1944, No. 21984. Addition to 570,703. [Class 98 (ii)] Intensification of a latent image in an exposed gelatino silver halide emulsion layer is produced by treatment of the layer subsequent to the exposure but prior to development with a solution containing sulphurous acid but free of developing agent, by removal uniformly of the unabsorbed solution without removal of the absorbed solution, and by storing the layer in air allowed to circulate freely over it for at least five minutes. A solution of sulphurous acid, sodium bisulphite, or potassium metabisulphite may be used, and should have a pH below 6. The colour sensitivity of the emulsion is not removed. The excess liquid may be removed by an air squeegee or wiping. The air may be allowed to circulate for 10 to 20 minutes. The sulphurous acid bath should not contain developing agents acting as antioxidants such as hydroquinone or iso-ascorbic acid. In examples, comparative figures are given for the speed, gamma and density of support plus fog, using a metol-hydroquinoneboric acid-borax developer with pre-treatments in distilled water, sodium bisulphite solution and potassium metabisulphite solution. Intensification of the latent image by exposure to ammonia vapour, by exposure to the radiation of a safelight, by subjection to the action of heat and humidity and by treatment with sulphur dioxide is referred to. Specification 510,808 is referred to.

56. 发明专利

GB563691A Improvements relating to phenazinium salts and their use in photographic emulsions and developers 未知
公开(公告)号：GB563691A
公开(公告)日：1944-08-28
申请号：GB288743
申请日：1943-02-22
申请人： KODAK LTD
IPC分类号： G03C5/32
摘要： Azine dyes, which are 1 : 3-diamino-N-alkyl (or substituted alkyl) phenazinium salts, and are suitable for use as desensitizers in photographic silver salt emulsions and in photographic developers, are obtained by reducing the corresponding dinitro-N-alkyl (or substituted alkyl) 5 : 10-dihydrophenazines in presence of an acid. Such reduction may be effected with a reducing metal salt of the acid present. Specified dinitro compounds used as starting materials are the 5-methyl-, 5-ethyl-, 5-benzyl-and 5 - b - hydroxyethyl - 1 : 3 - dinitro - 5 : 10-dihydrophenazines. In examples, (1) to (4), 5-methyl-, 5-ethyl-, 5-b -hydroxyethyl- and 5-benzyl - 1 : 3 - dinitro - 5 : 10 - dihydrophenazines respectively are heated with stannous chloride and hydrochloric acid in alcohol under reflux to obtain the correspondingly 5-substituted 1 : 3-diamino-phenazinium chlorides. In examples (5) and (6), 5 - methyl - 1 : 3 - dinitro - 5 : 10 - dihydrophenazine is heated with (5) iron powder, (6) tin, and hydrochloric acid in alcohol under reflux to obtain 5-methyl-1 : 3-diamino-5 : 10-dihydrophenazinium chloride. 5 - Alkyl (or substituted alkyl) - 1 : 3 - dinitro - 5 : 10-dihydrophenazines are obtained by heating the corresponding N-alkyl (or substituted alkyl)-o-picrylaminoaniline with sodium hydroxide in methyl alcohol under reflux. N-alkyl (or substituted alkyl)-o-picrylaminoanilines are obtained by condensation of picryl chloride with the corresponding o-amino-N-alkyl-aniline, obtained by condensation of o-nitrochlorobenzene with the corresponding alkylamine and reduction of the nitro group with sodium hydrosulphite.

57. 发明专利

FR863696A 未知
公开(公告)号：FR863696A
公开(公告)日：1941-04-07
申请号：FR863696D
申请日：1940-03-05
申请人： TECHNICOLOR MOTION PICTURE
IPC分类号： G03B15/00 , G03C5/32

58. 发明专利

FR811812A 未知
公开(公告)号：FR811812A
公开(公告)日：1937-04-23
申请号：FR811812D
申请日：1936-10-10
申请人： IG FARBENINDUSTRIE AG
IPC分类号： G03C5/32

59. 发明专利

GB461890A Photographic desensitisers 未知
公开(公告)号：GB461890A
公开(公告)日：1937-02-22
申请号：GB2336535
申请日：1935-08-20
申请人： IG FARBENINDUSTRIE AG
IPC分类号： G03C5/32
摘要： 461,890. Photographic desensitizers. GROVES, W. W. (I. G. Farbonindustrie Akt.- Ges.) Aug. 20,1935, No. 23365. [Class 98 (ii)] The desensitizer contains a colourless watersoluble derivative of the anthraquinone series, and at least 2 per cent of anhydrous sodium sulphite. Derivatives mentioned are sodium 1 - nitro - anthraquinone - 7 - sulphonate, sodium anthraquinone-2-sulphonate, sodium 1-chloroanthraquinone - 2 - carboxylate, and sodium anthraquinone-2-carboxylate. Anti-halation dyestuff is decolourized in the bath.

60. 发明专利

DE590717C 未知
公开(公告)号：DE590717C
公开(公告)日：1934-01-11
申请号：DET0031439
申请日：1926-02-12
申请人： TECHNICOLOR MOTION PICTURE
IPC分类号： G03C5/32

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