EP1061416A1 - Colour photographic developer concentrate - Google Patents
Colour photographic developer concentrate Download PDFInfo
- Publication number
- EP1061416A1 EP1061416A1 EP00201918A EP00201918A EP1061416A1 EP 1061416 A1 EP1061416 A1 EP 1061416A1 EP 00201918 A EP00201918 A EP 00201918A EP 00201918 A EP00201918 A EP 00201918A EP 1061416 A1 EP1061416 A1 EP 1061416A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concentrate
- colour
- developer
- hydroxylamine
- comparison
- Prior art date
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/407—Development processes or agents therefor
- G03C7/413—Developers
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C2200/00—Details
- G03C2200/44—Details pH value
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/264—Supplying of photographic processing chemicals; Preparation or packaging thereof
- G03C5/266—Supplying of photographic processing chemicals; Preparation or packaging thereof of solutions or concentrates
Definitions
- the developer solution for developing colour photographic materials is prepared from or, in the case of continuous operation, replenished with concentrates which contain the necessary constituents.
- one concentrate contains the antioxidant, an auxiliary solvent and an optical brightener
- a second concentrate contains the colour developer substance, for example CD 3 (N-ethyl-N-(2-methylsulfonylaminoethyl)-3-methyl-p-phenylenediamine)
- a third concentrate contains the buffer substance, alkali and a water softener.
- the first concentrate is alkaline (approx. pH 10)
- the second is strongly acidic and thus stable with regard to colour developer concentration
- the third is strongly alkaline.
- a small quantity of sulfite is generally added to the concentrate of the colour developer substance for stabilisation purposes.
- the quantity of sulfite must not be too large as it otherwise has a negative impact on sensitometry (inhibition of development and thus reduction of colour densities).
- Two one-part concentrates are currently commercially available, a) Monoline® RA-4 CD-R from Tetenal, a two-phase concentrate with a solid, undissolved phase deposited at the bottom and b) TriPhase® RA-4 CD-R from Trebla, a three-phase concentrate with undissolved constituents in the middle phase (c.f. also US 5 891 609).
- the object of the invention was to provide a two-part concentrate for a colour developer, neither part of which contains any undissolved constituents, from which parts a regenerating solution may rapidly be produced and which parts comprise a single phase.
- part 1 of the two-part concentrate containing the antioxidant, the auxiliary solvent, the optical brightener, the colour developer substance and 0.001 to 1 mol of hydroxylamine or a monoalkylated hydroxylamine or the salts thereof per litre of concentrate.
- hydroxylamine or monoalkylated hydroxylamine or the salts thereof are used, particularly preferably hydroxylammonium sulfate.
- Monoalkylated hydroxylamine is preferably of the formula HO-NH-R in which
- the colour of the stored concentrates is unchanged in comparison with the fresh preparations.
- a colour developer working solution was then prepared from these concentrates. 35 ml of part 1, 17.5 ml of part 2 and 35 ml of part 3 were used per litre. The pH is adjusted to 10.2 with potassium hydrogen carbonate. 2 g of potassium chloride were added per litre. The preparation is light yellow and clear and thus matches the preparation made from the fresh, unstored concentrates.
- Photographic materials were processed in these two preparations.
- the two processed materials in fresh, unstored concentration or in stored concentrate) exhibit no sensitometric differences (Table 1).
- Part 2 is identical to part 3 of Example 1.
- the colour of the stored concentrate, part 1 is distinctly darkened and deep brown in comparison with the fresh preparations.
- a colour developer working solution was then prepared from these concentrates. 28 ml of part 1 and 35 ml of part 2 were used per litre. The pH is adjusted to 10.2 with potassium hydrogen carbonate. 2 g of potassium chloride are added per litre. The preparation is dark and turbid, while the preparation made from the fresh, unstored concentrates is light in colour and clear.
- Example 2 As Example 2, but the part 1 concentrate is adjusted to pH 3.
- the colour of the stored part 1 concentrate is distinctly darkened and deep brown in comparison with the fresh preparations.
- the preparation is dark and turbid, while the preparation made from the fresh, unstored concentrates is light in colour and clear.
- Example 2 but the sulfite is omitted from the part 1 concentrate.
- the colour of the stored concentrate, part 1 is distinctly darkened and deep brown.
- Example 3 As Example 3, but the sodium disulfite is replaced by 5 g of hydroxylammonium sulfate.
- the colour of the stored concentrate, part 1 is unchanged in comparison with the fresh preparation.
- Example 2 but with 150 g of caprolactam instead of the polyethylene glycol and additionally with 5 g of hydroxylammonium sulfate.
- the colour of the stored concentrate, part 1 is unchanged in comparison with the fresh preparation.
- Part 2 is identical to part 3 of Example 1.
- the colour of the stored concentrate, part 1 is identical to that of the fresh preparation. (Yellow fog of processed material) Yellow D min x 1000 fresh stored Example 1 (Comparison) 114 116 Example 2 (Comparison) 114 137 Example 3 (Comparison) 115 155 Example 4 (Comparison) 113 132 Example 5 (Invention) 114 116 Example 6 (Invention) 113 115 Example 7 (Invention) 114 116 (CD 3 loss due to storage of concentrate for 1 week at 60°C) CD 3 content [g/l] fresh stored Example 1 (Comparison) 5.0 4.8 Example 2 (Comparison) 5.0 4.1 Example 3 (Comparison) 5.0 3.8 Example 4 (Comparison) 5.0 4.3 Example 5 (Invention) 5.0 4.8 Example 6 (Invention) 5.0 4.7 Example 7 (Invention) 5.0 4.9
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Cosmetics (AREA)
Abstract
Description
- R
- means C1-C10-alkyl, hydroxy-C1 -C10-alkyl, C1-C10-alkoxy-C1 -C10-alkyl, carboxy-C2-C10-alkyl, dicarboxy-C1 -C10-alkyl, carboxyhydroxy-C1 -C10-alkyl, hydroxy-C1 -C5-alkyl-(oxy-C1 -C5-alkyl)n, C1 -C5-alkoxy-C1 -C5-alkyl-(oxy-C1-C5-alkyl)n or aryl and
- n
- means a number from 1 to 4.
Polyethylene glycol, average MW 400 | 300 ml |
Diethylhydroxylamine, 85 wt.% aqueous solution (DEHX solution) | 120 ml |
Optical brightener | 20 g |
Water to make up to | 1000 ml |
pH 10 |
CD 3 | 280 g |
Sodium disulfite | 10 g |
Water to make up to | 1000 ml |
pH 1 |
Potassium hydroxide | 65 g |
Potassium carbonate | 600 g |
EDTA | 3 g |
Water to make up to | 1000 ml |
pH 14 |
Polyethylene glycol of an average MW of 400 | 375 ml |
DEHX solution | 150 ml |
Optical brightener | 25 g |
CD 3 | 250 g |
Sodium disulfite | 6.2 g |
Water to make up to | 1000 ml |
pH 5 |
Triethanolamine | 250 ml |
HADS | 120 g |
Optical brightener | 25 g |
CD 3 | 250 g |
Hydroxylammonium sulfate | 5 g |
Water to make up to | 1000 ml |
pH 3 |
(Yellow fog of processed material) | ||
Yellow Dmin x 1000 | ||
fresh | stored | |
Example 1 (Comparison) | 114 | 116 |
Example 2 (Comparison) | 114 | 137 |
Example 3 (Comparison) | 115 | 155 |
Example 4 (Comparison) | 113 | 132 |
Example 5 (Invention) | 114 | 116 |
Example 6 (Invention) | 113 | 115 |
Example 7 (Invention) | 114 | 116 |
(CD 3 loss due to storage of concentrate for 1 week at 60°C) | ||
CD 3 content [g/l] | ||
fresh | stored | |
Example 1 (Comparison) | 5.0 | 4.8 |
Example 2 (Comparison) | 5.0 | 4.1 |
Example 3 (Comparison) | 5.0 | 3.8 |
Example 4 (Comparison) | 5.0 | 4.3 |
Example 5 (Invention) | 5.0 | 4.8 |
Example 6 (Invention) | 5.0 | 4.7 |
Example 7 (Invention) | 5.0 | 4.9 |
Claims (4)
- Two-part colour photographic developer concentrate in which part 1 contains at least one antioxidant, at least one auxiliary solvent, at least one optical brightener and at least one colour developer substance and part 2 contains at least one buffer substance, alkali and at least one water softener, characterised in that part 1 additionally contains 0.001 to 1 mol of hydroxylamine or a monoalkylated hydroxylamine or the salts thereof per litre of concentrate.
- Developer concentrate according to claim 1, characterised in that part 1 additionally contains 0.005 to 0.3 mol of hydroxylamine or a monoalkylated hydroxylamine or the salts thereof per litre of concentrate.
- Developer concentrate according to claim 1, characterised in that part 1 contains N-ethyl-N-(2-methylsulfonylaminoethyl)-3-methyl-p-phenylenediamine as colour developer substance.
- Developer concentrate according to claim 1, characterised in that part 1 has a pH of 1.5 to 6.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19927601 | 1999-06-17 | ||
DE19927601A DE19927601A1 (en) | 1999-06-17 | 1999-06-17 | Color photographic developer concentrate |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1061416A1 true EP1061416A1 (en) | 2000-12-20 |
Family
ID=7911519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00201918A Ceased EP1061416A1 (en) | 1999-06-17 | 2000-05-29 | Colour photographic developer concentrate |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1061416A1 (en) |
DE (1) | DE19927601A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2910251A1 (en) * | 1978-03-15 | 1979-09-20 | Minnesota Mining & Mfg | COLOR DEVELOPER FOR COLOR PHOTOGRAPHIC RECORDING MATERIAL, METHOD FOR ITS MANUFACTURING AND ITS USE |
DE3801536A1 (en) * | 1988-01-20 | 1989-07-27 | Agfa Gevaert Ag | PHOTOGRAPHER COLOR DEVELOPER |
JPH08248600A (en) * | 1996-03-11 | 1996-09-27 | Konica Corp | Color developing solution for silver halide color photographic sensitive material improved in safety and preservability, etc. |
-
1999
- 1999-06-17 DE DE19927601A patent/DE19927601A1/en not_active Withdrawn
-
2000
- 2000-05-29 EP EP00201918A patent/EP1061416A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2910251A1 (en) * | 1978-03-15 | 1979-09-20 | Minnesota Mining & Mfg | COLOR DEVELOPER FOR COLOR PHOTOGRAPHIC RECORDING MATERIAL, METHOD FOR ITS MANUFACTURING AND ITS USE |
DE3801536A1 (en) * | 1988-01-20 | 1989-07-27 | Agfa Gevaert Ag | PHOTOGRAPHER COLOR DEVELOPER |
JPH08248600A (en) * | 1996-03-11 | 1996-09-27 | Konica Corp | Color developing solution for silver halide color photographic sensitive material improved in safety and preservability, etc. |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 01 31 January 1997 (1997-01-31) * |
Also Published As
Publication number | Publication date |
---|---|
DE19927601A1 (en) | 2001-01-11 |
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