DEP0055467DA - Durable photographic fixing developers - Google Patents
Durable photographic fixing developersInfo
- Publication number
- DEP0055467DA DEP0055467DA DEP0055467DA DE P0055467D A DEP0055467D A DE P0055467DA DE P0055467D A DEP0055467D A DE P0055467DA
- Authority
- DE
- Germany
- Prior art keywords
- developer
- durable
- weight
- photographic fixing
- parts
- 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.)
- Expired
Links
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000008121 dextrose Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 description 1
Description
Dr. »'alter ffraxl und grast Foarnes, Wien,Dr. "'Old ffraxl and grazes Foarnes, Vienna,
Haltbare photograph!βehe fixierentwickler.Durable photograph! Without fixing developer.
sr-ÖTiVl4AC4 6 w»if? ein Entwickler be scr rieben der nebem den. üblichen Natriumsulfat als Stabilisator der Entwicklersubstanz en gegen den Angriff durch die Luft auch. 'Traubenzucker bzw. ähnlich ;irkende organische Substanzen zugleich mit Ätzalkali enthält. Auf diese weise *a# es möglich, ätaalkali sehe Entwickler gegen die Lufteinwirkung weitgehend au schützen, da der Traubenzucker im selben Kasse wie die Alkalitat steigt mit dem Luftsauerstoff zu reagieren imstande ist. Ln weiterer Folge kenn te die so erzielte hohe k&t wick lungs g eschwiixdigkeit fur die Lösung des Problems der Fixierentwickler eingesetzt werden, e*- zwar^äass die fintwicklungsggschwindigfceit in einem föasse beschleunigt wird, dass der SntwicKlungsproaess/fu dem Aeitponkt praktisch beendet xgt, in welchem die Fixierwirkung des tfhiosalfatfi/STnsetsst,sr-ÖTiVl4AC4 6 w »if? A developer is working on the next. Usual sodium sulphate as a stabilizer of the developer substances against attack by the air too. 'Contains dextrose or similar active organic substances at the same time as caustic alkali. In this way it is possible to protect the eta-alkali developer against the effects of air to a large extent, since the grape sugar is able to react with the oxygen in the air in the same way as the alkalinity increases. As a further consequence, the high development speed achieved in this way could be used to solve the problem of the fixing developer, e * - although the development speed is accelerated in a way that the development process for the precursor is practically terminated which the fixing effect of the thiosalfatfi / STnsetsst,
Dabei zeigte sich aber der üfangel, dass die iüntwicklungsreagentien wiö das Sffetol and das Hydrochinon nicht nur das Silber, das dem Bildaufbau dient,/sondern ^s^, wenn auch später, so doch unerwünscht früh, das/^Ulber reduzierten, welches das Thiosulfat in Lösung gebracht ha τteβ Dadurch wurde der Entwickler bald grau von ausgefallenem Silber, und es besrtand aussordeff· die Befahl? der Bildung d«^ dichroitischen! Schleier«Here, however, the üfangel showed that the iüntwicklungsreagentien wiö the Sffetol and hydroquinone not only the silver that is used to screen layout, / but ^ s ^, although later, yet undesirable early, reduced the / ^ Ulber which thiosulfate the solubilized ha β τte result, the developer was now gray from precipitated silver, and there besrtand aussordeff · the Ordered? the formation of dichroic! Veil"
Um diesem übe±lstand z\x begegenen, -1 To this practice ± oil level z \ x begegenen - 1
von Seignette^ealz zum Entwickler» Esvon Seignette ^ ealz to the developer »Es
ist wohl an sich bekannt, dass Seignettesalz die Ausfällung von Metallen aus ihren wässrigen Salzlösung en. durch komplex-It is well known that Seignette salts are the precipitation of metals from their aqueous salt solutions. through complex
salzbzlfiung zurückhält, nicht bekannt 4. st aber die ferwenöung dieses salzes für den vorliegenden aweck. Der erfolg dieses Zusatzes war überraschend. Der Entwickler blieb auch bei wiederholter Verwendung lange 2eit klar, und auch die unbelichteten Stellen des entwickelten Bildes blieben glasklar«.salt level withholding, not known 4. but st the temperature of this salt for the present time. The success of this Addition was surprising. Even after repeated use, the developer remained clear for a long time, as did the unexposed ones Parts of the developed image remained crystal clear «.
Die Menge des Seignet tesalzz uaataes richtet sich nach dem beabsichtigten Wirkungsgrade Je grosser der Zusatz desto
geringer die Schleierbilöun^ und desto beständiger, der Entwiekler and umgekehrt«, line obere Grenze ergibt sich/aas ökonomischen
Gesicht punkten β Man wird Hut eineai Zusatz von 3—5 Se» wichtsteilen auf 100 Yülumteile fertigen Entwicklers schon einen
Merklichen Effekt erzielens den tt.an wesentlich steigern kanns wenn man den Seignettesalzausatss auf 30 Gewichteteile
pro 100 folttffiteile Entwickler erhöht.
Bei 8 pi el ι
Ansatz einee haltbaren PixierentwieklerstThe amount of Seignet salt depends on the intended degree of effectiveness. The greater the addition, the lower the veil effect and the more stable, the developer and vice versa. 5 Se "weight parts per 100 Yülumteile finished developer has a marked effect achieve s the tt.an can significantly increase s by increasing the Seignettesalzausatss to 30 weight parts per 100 folttffiteile developers.
At 8 pi el ι
Approach a durable pixier you develop
IeO Sewichtsteil salesaures ffionomethylparaiaidophenolsulfat.IeO weight part of salesaures ffionomethylparaiaidophenolsulfat.
0*4 Gewichtsteile Hydrochinon f 0 * 4 parts by weight of hydroquinone f
3*2 ßewichtsteile BEt^UKSuIfIt7 3 * 2 parts by weight BEt ^ UKSuIfIt 7
4e0 Gewichtsteile Katriumthiosulfat sicce 2*0 G-ewichtsteSile Ätznatron4 e 0 parts by weight of sodium thiosulphate sicc e 2 * 0 by weight of caustic soda
IeO GewichtstelleIeO weight point
3»0 Gewichtsteile ü'raubenaucker und3 »0 parts by weight ü'raubaucker and
6e0 Sewichtsteile Seignettesalz mit fässer su 100 ?ol&mtei» len gelöste geben eine haltbare gebrauchsfertige Fixierwicklerlösung. 6e0 Weight parts of Seignette salt with barrels of 100? Ol & mtei »len dissolved give a durable, ready-to-use fixing curler solution.
Claims (1)
Family
ID=
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