US1880503A - Ultra-violet sensitive layer - Google Patents

Ultra-violet sensitive layer Download PDF

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Publication number
US1880503A
US1880503A US536938A US53693831A US1880503A US 1880503 A US1880503 A US 1880503A US 536938 A US536938 A US 536938A US 53693831 A US53693831 A US 53693831A US 1880503 A US1880503 A US 1880503A
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United States
Prior art keywords
ultra
violet
sensitive layer
sensitive
layer
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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 - Lifetime
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US536938A
Inventor
Samuel E Sheppard
Herbert J Dietz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
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Eastman Kodak Co
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Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US536938A priority Critical patent/US1880503A/en
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Publication of US1880503A publication Critical patent/US1880503A/en
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    • 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
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/08—Sensitivity-increasing substances

Definitions

  • This invention relates to a photo-sensitive layer, the sensitivity of which lies chiefly 1n the ultra-violet.
  • a light sensitive material which reacts to the near ultra-violet rays without being appreciably affected by the rest of the spectrum.
  • a material may be used to demonstrate or dose the ultra-violet radiation of sunlight and of various artificial light sources, particularly those used therapeutically. It is an object of this invention to produce such a material.
  • Thallic oxalate is particularly useful and it may be prepared in a suitable colloid carrier and coated on any suitable support.
  • E mample I 5 grams of thallic chloride are dissolved in 50 c. c. of water and poured with vigorous stirring into a solution of grams of potassium oxalatedissolved in 50 c. c. of gelatin solution. The mixed solutions are coated on sized paper, either by hand or by suitable machines, and then dried at 60 to 80 degrees C.
  • Example II 5 grams of thallic chloride are dissolved in 50 c. c. of water and poured with stirring into a solution of 10 grams of potassium Application filed May 12,
  • a good grade of sized aper is, however, preferable as the image a ter exposure is more easilyvisible on an opaque white support.
  • a photo-sensitive element sensitive primarily to the ultra-violet comprising a support and a layer of a colloid containing thallic oxalate.
  • An actinometric paper comprising a I support of paper and a layer of a colloid containing thallic oxalate.
  • An actinometric paper comprising a .support of paper and a layer of "gelatin con York, this 7th oxalate dissolved in c. c. of 5% gum arabic solution. As before the mixed solutions are coated and dried.

Description

. Patented Oct. 4, 1932 UNITED STATES PATENT OFFICE SAMUEL E. SHEPPARD AND HERBERT J. DIETZ, OF ROCHESTER, NEW YORK, ASSIGNORS T EASTMAN KODAK COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK ULTRA-VIOLET SENSITIVE LAYER .No Drawing.
This invention relates to a photo-sensitive layer, the sensitivity of which lies chiefly 1n the ultra-violet.
It is desirable for certain actinometric purposes to have a light sensitive material which reacts to the near ultra-violet rays without being appreciably affected by the rest of the spectrum. Specifically such a material may be used to demonstrate or dose the ultra-violet radiation of sunlight and of various artificial light sources, particularly those used therapeutically. It is an object of this invention to produce such a material.
We have found that thallium salts are sensitive to the ultra-violet and may therefore be used as the basis of the kind of layer described. Thallic oxalate is particularly useful and it may be prepared in a suitable colloid carrier and coated on any suitable support.
Application of the invention to the making of an ultra-violet sensitive paper is as follows:
E mample I 5 grams of thallic chloride are dissolved in 50 c. c. of water and poured with vigorous stirring into a solution of grams of potassium oxalatedissolved in 50 c. c. of gelatin solution. The mixed solutions are coated on sized paper, either by hand or by suitable machines, and then dried at 60 to 80 degrees C.
Example II 5 grams of thallic chloride are dissolved in 50 c. c. of water and poured with stirring into a solution of 10 grams of potassium Application filed May 12,
any other suitable support. A good grade of sized aper is, however, preferable as the image a ter exposure is more easilyvisible on an opaque white support.
turns rown on exposure to ultra-violet vA layer made in themanner described 5 light, and has very little sensitivity to visible v light.
What we claim is: i 1. A photo-sensitive layer sensitive primarily oxalate.
to the ultra-violet comprising thallic 2. A photo-sensitive layer 'sensitivei primarily to the ultra-violet comprising thallic oxalate and a colloid carrier. 7 f
3. A photo-sensitive element sensitive primarily to the ultra-violet comprising a support and a layer of a colloid containing thallic oxalate.
4. An actinometric paper comprising a I support of paper and a layer of a colloid containing thallic oxalate.
5. An actinometric paper comprising a .support of paper and a layer of "gelatin con York, this 7th oxalate dissolved in c. c. of 5% gum arabic solution. As before the mixed solutions are coated and dried.
The proportions as stated may be varied somewhat and other suitable colloids may be used instead of gelatin or gum arabic.
Example I I I ico
US536938A 1931-05-12 1931-05-12 Ultra-violet sensitive layer Expired - Lifetime US1880503A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427443A (en) * 1943-06-04 1947-09-16 Dick Co Ab Light-sensitive layer and processes of making and exposing it
US2432908A (en) * 1942-07-22 1947-12-16 Rca Corp Cathode-ray target and method of manufacture
US2967105A (en) * 1955-10-05 1961-01-03 Stupa Corp Photosensitive sheet
US3778269A (en) * 1971-11-19 1973-12-11 Us Army Method for use of inorganic azides as photosensitive materials at low temperatures

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432908A (en) * 1942-07-22 1947-12-16 Rca Corp Cathode-ray target and method of manufacture
US2427443A (en) * 1943-06-04 1947-09-16 Dick Co Ab Light-sensitive layer and processes of making and exposing it
US2967105A (en) * 1955-10-05 1961-01-03 Stupa Corp Photosensitive sheet
US3778269A (en) * 1971-11-19 1973-12-11 Us Army Method for use of inorganic azides as photosensitive materials at low temperatures

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