USRE13162E - London - Google Patents
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- Publication number
- USRE13162E USRE13162E US RE13162 E USRE13162 E US RE13162E
- Authority
- US
- United States
- Prior art keywords
- silver
- grams
- solution
- cubic centimeters
- london
- Prior art date
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- 239000000839 emulsion Substances 0.000 description 7
- SQGYOTSLMSWVJD-UHFFFAOYSA-N Silver nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- LNTHITQWFMADLM-UHFFFAOYSA-N Gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
- FJOLTQXXWSRAIX-UHFFFAOYSA-K Silver phosphate Chemical compound [Ag+].[Ag+].[Ag+].[O-]P([O-])([O-])=O FJOLTQXXWSRAIX-UHFFFAOYSA-K 0.000 description 2
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229940071575 silver citrate Drugs 0.000 description 2
- 229910001961 silver nitrate Inorganic materials 0.000 description 2
- 229940019931 silver phosphate Drugs 0.000 description 2
- 229910000161 silver phosphate Inorganic materials 0.000 description 2
- QUTYHQJYVDNJJA-UHFFFAOYSA-K trisilver;2-hydroxypropane-1,2,3-tricarboxylate Chemical compound [Ag+].[Ag+].[Ag+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QUTYHQJYVDNJJA-UHFFFAOYSA-K 0.000 description 2
- 229940074391 Gallic acid Drugs 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- IOLCXVTUBQKXJR-UHFFFAOYSA-M Potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M Potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- QEEAPRPFLLJWCF-UHFFFAOYSA-K Potassium citrate Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 description 1
- KMUONIBRACKNSN-UHFFFAOYSA-N Potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 1
- SDLBJIZEEMKQKY-UHFFFAOYSA-M Silver chlorate Chemical compound [Ag+].[O-]Cl(=O)=O SDLBJIZEEMKQKY-UHFFFAOYSA-M 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229940027985 antiseptics and disinfectants Silver compounds Drugs 0.000 description 1
- ZUVOYUDQAUHLLG-OLXYHTOASA-L disilver;(2R,3R)-2,3-dihydroxybutanedioate Chemical compound [Ag+].[Ag+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O ZUVOYUDQAUHLLG-OLXYHTOASA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001804 emulsifying Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 235000004515 gallic acid Nutrition 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000001508 potassium citrate Substances 0.000 description 1
- 229960002635 potassium citrate Drugs 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 150000003379 silver compounds Chemical class 0.000 description 1
- 229940100890 silver compounds Drugs 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
- 239000011791 tripotassium citrate Substances 0.000 description 1
- 235000015870 tripotassium citrate Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Definitions
- the photographic papers prepared with this emulsion show the following excellent, qualities: They are extremely durable and excellently graded and permanent copies .with beautiful and brilliant tones without being washed before toning in the wellknown goldand platinunn baths.
- it is a further considerable advantage that it is not necessary to expose these papers under the negative up to the full power of the picture. It is only necessary to expose the same according to the density of the negative from twenty to thirty seconds to the. action of the day-light, .in order to obtain a slightly visiblepicture which in dull day-light or in the usual lamplight can be developed in a. very simple manner to any desired power.
- the developer conslsts for instance of a solution of: 0.16 grams of potassium bichromate and 0.1 grams of potassium bromid in live hundred cubic centimeters of dlstll-led water, to each fifty cubic centlmeters of which solution before using the same thirty drops of a solution of two percent. of gallic acid in alcohol are added.
Description
UNITED sTAT Es 1 ATENT OFFICE.
YORK SCHWARTZ, 0F HANOVILIR, GERMANY, ASSIGNOR T0 SYNOLOIDS LII III'IED, OF
LONDON, ENGLAND.
PHOTOGRAPHIC EMULSION.
Specification of Reissued Letters Patent. Reissued Oct. 25, 1910.
No Drawing. Original No. 710,019, dated September 30, 1902, SerialNo. 111,227. Reissue No. 13,1;44, dated August 16,11910, Serial No. 540,472. Application for reissue filed August 26, 1910. Serial No. 579,1201}.
-for manufacturing photographic emulsions without using any halogenous silver-compounds, but thesetrials have not been very successfulas 1n the photographs manufactured by. means of such emulsions the gradations between the intense lights and the intense shadows are too small, so that the photographs are not brilliant enough, that is to say, they are not sufficiently rich in contrasts. I do away with this disadvantage by my new invention which consists in emulsifying the silver phosphate in gelatin-wintions in the presence of silver chlorate and silver citrate. Instead of silver citrate, silver tartrate can be used.
An excellent emulsion is obtained by mixing the following solutions: (l -L) 10.5 grams gelatin dissolved in eighty cubic centimeters distilled water. (13.) 1.9 grams di-sodiiun phosphate (Na HP() -12 H O) 0.6 grams potassium chlorate 1.7 grams neutral potassium citrate (K C H O +H O) 0.4 grams citric; acid, dissolved in forty cubic centimeters distilled water. (U) 5.2.gra1ns crystal: lized silver nitrate dissolved in ten cubic centimeters distilled Water. The mixing of this solution is effected in the following way: The solution B is added to the solu-' tion A, then ten cubic centimeters of distilled water are added, whereupon solution C is added in small quantities to the mixture of the solutions A and B, at the same time thoroughly shaking the mixture.
The above proportions are such that in the ready emulsion no free silver nitrate is con tained.
The photographic papers prepared with this emulsion show the following excellent, qualities: They are extremely durable and excellently graded and permanent copies .with beautiful and brilliant tones without being washed before toning in the wellknown goldand platinunn baths. The finished pictures'are very strong and resist mechanical effects as well as the effects-of the atmosphere extremely well. Besides these advantages it is a further considerable advantage that it is not necessary to expose these papers under the negative up to the full power of the picture. It is only necessary to expose the same according to the density of the negative from twenty to thirty seconds to the. action of the day-light, .in order to obtain a slightly visiblepicture which in dull day-light or in the usual lamplight can be developed in a. very simple manner to any desired power.
The developer conslsts for instance of a solution of: 0.16 grams of potassium bichromate and 0.1 grams of potassium bromid in live hundred cubic centimeters of dlstll-led water, to each fifty cubic centlmeters of which solution before using the same thirty drops of a solution of two percent. of gallic acid in alcohol are added.
After "washing the so developed pictures they are treated in the same manner as the pictures which were perfectly copied-under I the negative.
The sensitiveness to the action of the light,
.of the paper is so great that the light of a inagnesium-stri E this invention, what I desire to secure by name to this specification in the presence of Letters Patent of the United Statesfls the subscribing witnesses. v. 1 A photographic emulsion, containing an YORK SCHWARTZ. emulsifying agent, silver-phosphate, silver Witnesses:
5 chlorate, and :1 silver salt of an organic acid, LoUlzn KNOKE,
substantially as described. i 'LEONORE RASOH, In testimony whereof I have signed my (1C. STEVENSON.
Family
ID=
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