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EP0461783A1 - Photographic developer composition
- https://patents.google.com/patent/EP0461783A1/en
- An aqueous alkaline developer composition which does not contain either hydroquinone or an alkali metal hydroxide comprises (a) an ascorbic acid-type developer, (b) a sulfite or bisulfite, (c) a 3-pyrazolidone developing agent and (d) sodium sulfate and/or glutaraldehyde. Preferably, the developer is ascorbic or erythorbic acid or a salt thereof.
US2688549A - Photographic developer composition
- https://patents.google.com/patent/US2688549A/en
- US2688549A - Photographic developer composition - Google Patents Photographic developer composition Download PDF Info Publication number ... developer acid compounds ascorbic acid Prior art date 1953-08-03 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no ...
CA558528A - Photographic developer composition
- https://patents.google.com/patent/CA558528A/en
- photographic composition developer Prior art date 1958-06-10 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a …
DE3307507A1 - PHOTOGRAPHIC DEVELOPER …
- https://patents.google.com/patent/DE3307507A1/en
- PHOTOGRAPHIC DEVELOPER COMPOSITION Info Publication number DE3307507A1. ... Prior art keywords developer developer composition polymaleic anhydride color hydrolyzed polymaleic Prior art date 1983-03-03 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no ...
CA999467A - Photographic developer compositions
- https://patents.google.com/patent/CA999467A/en
- photographic developer developer compositions compositions photographic developer Prior art date 1971-02-15 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired Application number CA133,694A Other ...
CA538016A - Photographic developer compositions
- https://patents.google.com/patent/CA538016A/en
- photographic developer developer compositions compositions photographic developer Prior art date 1957-03-12 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired Application number CA538016A Other ...
Photographic developer composition - Konica Corporation
- https://www.freepatentsonline.com/5278036.html
- A composition for developing a silver halide photographic light-sensitive material is disclosed. The composition has a form of a tablet or granule and comprises an organic development inhibitor having a solubility of not higher than 1 % by weight in an aqueous medium having a pH value of 6 to 12, and a water-soluble or alkali-soluble polymer having a melting point of 30° C. …
Photographic developer composition - Fuji Photo Film Co., Ltd.
- https://www.freepatentsonline.com/4022621.html
- A photographic developer composition containing (1) a developing agent, (2) a carbonyl-bisulfite, (3) a carbonate and (4) a primary or secondary alkanolamine, the alkanolamine being present in a molar amount less than the amount of said carbonylbisulfite. Inventors: Hayashi, Katsumi (Minami-ashigara, JA) Iijima, Yoo (Minami-ashigara, JA)
JPS5595947A - Photographic developer composition
- https://patents.google.com/patent/JPS5595947A/ja
- developer composition silver halide acetylene glycol halide photographic Prior art date 1979-01-11 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Pending Application number JP101979A Other languages ...
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