AT40618B - Process for preparing a silver phosphate emulsion. - Google Patents
Process for preparing a silver phosphate emulsion.Info
- Publication number
- AT40618B AT40618B AT40618DA AT40618B AT 40618 B AT40618 B AT 40618B AT 40618D A AT40618D A AT 40618DA AT 40618 B AT40618 B AT 40618B
- Authority
- AT
- Austria
- Prior art keywords
- preparing
- silver phosphate
- emulsion
- phosphate emulsion
- silver
- Prior art date
Links
- 239000000839 emulsion Substances 0.000 title claims description 7
- FJOLTQXXWSRAIX-UHFFFAOYSA-K silver phosphate Chemical compound [Ag+].[Ag+].[Ag+].[O-]P([O-])([O-])=O FJOLTQXXWSRAIX-UHFFFAOYSA-K 0.000 title claims description 3
- 229940019931 silver phosphate Drugs 0.000 title claims description 3
- 229910000161 silver phosphate Inorganic materials 0.000 title claims description 3
- 238000004519 manufacturing process Methods 0.000 title description 2
- 238000011161 development Methods 0.000 description 3
- 229910019142 PO4 Inorganic materials 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
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 1
- 238000012822 chemical development Methods 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 159000000011 group IA salts Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
Landscapes
- Colloid Chemistry (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Herstellung einer Silberphosphatemulsion.
EMI1.1
aufweist. Es wurde nun gefunden, dass eine wesentlich grössere Empfindlichkeit der Emulsion erzielt werden kann, wenn bei der Herstellung der Emulsion ein solcher Überschuss an Phosphat genommen wird, dass alles Silber in der Form des unlöslichen Phosphates vorliegt, gleichwohl aber auch Chlorsäure und organische Säure vorhanden ist.
Bei Herstellung der Emulsion verfährt man so, dass man einen erheblichen Überschuss von
EMI1.2
Bilder zeigen grosse Kraft und sehr schönen Ton, sowie ausserordentliche Haltbarkeit. Wenn man dem Metol noch neutrales Natriumsulfat, oder ein anderes, schwach alkalisch wirkendes Salz zusetzt, so beschleunigt man die Entwicklung derart, dass sie fast momentan ist und in eine chemische Entwicklung, d. h. also durch die ganze Schicht hindurch übergeht. Bemerkenswert ist, dass dann allerdings diese Entwicklung auch nicht weiter geht, sondern plötzlich stehen bleibt. Diese Entwickelungsart kommt für Platten mit dieser Emulsion in Frage.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for preparing a silver phosphate emulsion.
EMI1.1
having. It has now been found that a significantly greater sensitivity of the emulsion can be achieved if such an excess of phosphate is used in the preparation of the emulsion that all the silver is in the form of the insoluble phosphate, but chloric acid and organic acid are also present .
When preparing the emulsion one proceeds so that one has a considerable excess of
EMI1.2
Pictures show great power and very beautiful tone, as well as extraordinary durability. If one adds neutral sodium sulphate or another, weakly alkaline salt to the Metol, the development is accelerated in such a way that it is almost instantaneous and in a chemical development, i. H. so goes through the whole shift. It is noteworthy that then this development does not continue, but suddenly stops. This type of development can be used for plates with this emulsion.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT40618D AT40618B (en) | 1902-04-12 | 1907-04-13 | Process for preparing a silver phosphate emulsion. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT16126T | 1902-04-12 | ||
| AT40618D AT40618B (en) | 1902-04-12 | 1907-04-13 | Process for preparing a silver phosphate emulsion. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT40618B true AT40618B (en) | 1910-01-25 |
Family
ID=25596318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT40618D AT40618B (en) | 1902-04-12 | 1907-04-13 | Process for preparing a silver phosphate emulsion. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT40618B (en) |
-
1907
- 1907-04-13 AT AT40618D patent/AT40618B/en active
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