JPS5773739A - Reducer for printing - Google Patents
Reducer for printingInfo
- Publication number
- JPS5773739A JPS5773739A JP14911480A JP14911480A JPS5773739A JP S5773739 A JPS5773739 A JP S5773739A JP 14911480 A JP14911480 A JP 14911480A JP 14911480 A JP14911480 A JP 14911480A JP S5773739 A JPS5773739 A JP S5773739A
- Authority
- JP
- Japan
- Prior art keywords
- reducer
- hedp
- economical
- salt
- molar ratio
- 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.)
- Granted
Links
- 239000003638 chemical reducing agent Substances 0.000 title abstract 5
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 abstract 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 abstract 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 229910000765 intermetallic Inorganic materials 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- NQXWGWZJXJUMQB-UHFFFAOYSA-K iron trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].Cl[Fe+]Cl NQXWGWZJXJUMQB-UHFFFAOYSA-K 0.000 abstract 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- 235000017550 sodium carbonate Nutrition 0.000 abstract 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/40—Chemically transforming developed images
- G03C5/42—Reducing; Intensifying
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
PURPOSE:To obtain an economical reducer with superior work efficiency, shelf stability, etc. by preparing a reducer for photoengraving contg. hydroxyethylidene diphosphonic acid (HEDP) or a salt thereof and tervalent Fe ion. CONSTITUTION:HEDP represented by the formula or a salt thereof is dissolved in an aqueous soln. of FeCl3.6H2O in (0.1-1.0)/(0.1-1.0) molar ratio. In case of 1:1 molar ratio, a precipitate may be formed, so it is desirable to use more HEDP. The resulting soln. is adjusted to 0.2-8.0pH with NH3, NaOH, Na2CO3 or the like. When a larger amount of silver for an image is used, a lower pH value is effective. Thiosulfate, thiourea or the like is added as a fixing agent. Thus, an economical reducer comparable or superior to a conventional reducer and having high shelf stability and work efficiency is obtd. without using a heavy metallic compound such as a compound of Cr, Cu or Ce causing the problem of enviromnental pollution due to waste water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14911480A JPS5773739A (en) | 1980-10-24 | 1980-10-24 | Reducer for printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14911480A JPS5773739A (en) | 1980-10-24 | 1980-10-24 | Reducer for printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5773739A true JPS5773739A (en) | 1982-05-08 |
| JPS6361653B2 JPS6361653B2 (en) | 1988-11-29 |
Family
ID=15468012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14911480A Granted JPS5773739A (en) | 1980-10-24 | 1980-10-24 | Reducer for printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5773739A (en) |
-
1980
- 1980-10-24 JP JP14911480A patent/JPS5773739A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6361653B2 (en) | 1988-11-29 |
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