USRE13144E - Schwabtz - Google Patents
Schwabtz Download PDFInfo
- Publication number
- USRE13144E USRE13144E US RE13144 E USRE13144 E US RE13144E
- Authority
- US
- United States
- Prior art keywords
- silver
- grams
- solution
- cubic centimeters
- emulsion
- Prior art date
Links
- 239000000839 emulsion Substances 0.000 description 9
- 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
- FJOLTQXXWSRAIX-UHFFFAOYSA-K Silver phosphate Chemical compound [Ag+].[Ag+].[Ag+].[O-]P([O-])([O-])=O FJOLTQXXWSRAIX-UHFFFAOYSA-K 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229940019931 silver phosphate Drugs 0.000 description 3
- 229910000161 silver phosphate Inorganic materials 0.000 description 3
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229940071575 silver citrate Drugs 0.000 description 2
- 229910001961 silver nitrate 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
- BNIILDVGGAEEIG-UHFFFAOYSA-K Disodium phosphate Chemical compound [Na+].[Na+].[O-]P([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-K 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 229960003975 Potassium Drugs 0.000 description 1
- IOLCXVTUBQKXJR-UHFFFAOYSA-M Potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-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
- 239000002253 acid Substances 0.000 description 1
- 229940027985 antiseptics and disinfectants Silver compounds Drugs 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 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
- 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
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium 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
- 239000000126 substance Substances 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 developer consists 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 distilled water. to each fifty cubic centimeters of which solution before using the same thirty drops of a solution of two per cent. of gallie acid in alcohol are added.
Description
YORK SCHWARTZ, 0F HANOVER. GERMANY, ASSIGNOR TO LONDON, ENGLAND.
PHOTOGRAPHIC EMULSION.
(No Drawing. original No. 710,019, dated September 30, 1902, Serial No.
Specification of Reissued Letters Patent. Reissu 1 Aug.16,1910. 111,227. Application for reissue filed January 27, 1910. Serial No. 540,472.
1 '0 all whom it may concern:
Be it known that I, YORK SCHWARTZ, a subject of the King of Prussia, German Emperor, and a resident of 3 Edenstrasse. Hanover, in the Province of Hanover, German Empire, have invented a new and Improved Photographic Emulsion, of which the following is an exact specification.
It has been tried to use silver phosphate for manufacturing photographic emulsions.
Without using any halogenous silver-compounds, but these trials have not been very successful as in 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 thatis 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-solutions in the presence of silver chlorate and silver citrate. instead of silver citrate, silver tartrate can be used.
An excellent. emulsion is obtained by miss ing the following solutions: (A) 15.0 grams gelatin dissolved in eighty cubic centimeters distilied water. 1.9 grams di-sodium phosphate Na HPQ I-IQ H O) 0.6 grams potassium c lorate 1.7 grams neutral potassium citrate .(K C H O +H O) 0.4 grams citric acid, dissolved in forty cubic centimeters distilled Water. ((1) 5.2 grams crystallized silver nitrate dissolved in ten cubic centimeters distilled Water. The mixing of this solution is effected in'thc following way: The solution B is added to the solution A. then ten cubic centimeters ol distilled Water are added, whereupon solution C is added in small quantities to the mixture of the solutions A and ii, at the same limo thoroughly shaking the n'iixture.
The above proportionsare such that in the ready emulsion no free silver nitrate is contained. i
he photographic papers prepared with this emulsion show the following excellent oualities: They are extremely durable and.
do not show any changes even after several months When kept. in an open envelop Without surrounding the same With a Watertight material. The coating is so even and hard that even in summer time the use of hardening substances is unnecessary. They give excellently graded and permanent copies with beautiful and brilliant tones without being Washed before toning in the Wellknown goldand platinumbaths. The finished pictures are very strong and resist mechanical efi'ects as Well as the effects of the atmosphere extremely Well. Besides theseadvantages 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 visible picture which in dull day-light. or in the usual lamplightcan be developed in a very simple main nor to any desired power.
The developer consists 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 distilled water. to each fifty cubic centimeters of which solution before using the same thirty drops of a solution of two per cent. of gallie acid in alcohol are added. I
After washing the so developed pictures they are lrcaled in the same manner as .the picturcs which were perfectly copied under the negative.
'lhc scnsil ivcncss to the action. of the light oi the paper is so great that the light of a magncsimn-slrip of 2.5 centimeters length and 3 millimeters breadth which is burned at a distance of 30 centimeters from the copying frame is sullicient for producing av picture which can be developed to the full extent.
Tt will be clear that the emulsions may be used for manufacturing any kind of sensi tive films or surfaces for photographic purposes. I
SYNOLOIDS LIMITED, 0F
Having thus 'fully described the nature name to this specification in the-presence of of this invention, vWhat I desire to secure by the subscribing witnesses. Letters Patent of the United States is A photographic emulsion, containing an YORK SCHWARTZ 5v emulsifying agent, silver-phosphate, silver Witnesses: chlorate, and a silver salt of an organic acid, LOUISE KNOKE, substantially as described. LEONORE RASGH,
In testimony whereof I have signed my C. STEVENSON.
Family
ID=
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