US1878684A - Ultra-violet sensitive paper - Google Patents

Ultra-violet sensitive paper Download PDF

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Publication number
US1878684A
US1878684A US533365A US53336531A US1878684A US 1878684 A US1878684 A US 1878684A US 533365 A US533365 A US 533365A US 53336531 A US53336531 A US 53336531A US 1878684 A US1878684 A US 1878684A
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United States
Prior art keywords
ultra
violet
paper
sensitive paper
sensitive
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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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US533365A
Inventor
Leon W Eberlin
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Eastman Kodak Co
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Eastman Kodak Co
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Publication date
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Priority to US533365A priority Critical patent/US1878684A/en
Application granted granted Critical
Publication of US1878684A publication Critical patent/US1878684A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
    • G03C1/73—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing organic compounds

Definitions

  • This invention relates to photo-sensitive paper, the sensitivity of which lies chiefly in 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 ultraviolet radiation of sunl ght and of various artificial light sources, particularly those used therapeutically. It is an object of this invention to produce such a paper.
  • ortho-nitrobenzaldehyde undergoes molecu lar rearrangement to orth-nitroso-benzoic acid.
  • a suitable indicator with ortho-nitro-benzaldehyde I have been able to produce a paper which is sensitive primarily to the ultra-violet and which has very little sensitivity in the visible spectrum.
  • this paper gives within a short time a visible color change showing the transformation or rearrangement just described.
  • a test paper suitable for determining the intensity of ultra-violet light may be made by dipping sheets of unsized paper into a solution of Example I Ortho-nitro-benzaldehyde 1 gram Lacmoid 0.1 gram Ethyl alcohol 100 0.0.
  • Papers may be made with such solutions by either dipping or floating the sheets of paper upon the solution, then withdrawing and drying. Sized paper will, as a rule, not
  • a photo-sensitive sheet sensitive primarily to the ultra-violet comprising orthonitro-benzaldehyde and an indicator.
  • a photo-sensitive sheet sensitive primarily to the ultra-violet comprising orthonitro-benzaldehyde and an indicator, which gives on exposure a visible color change.

Description

Patented Sept. 20, 1932 UNITED STATES PATENT OFFICE LEON W. EBERLIN, OF ROCHESTER, NEW YORK, ASSIGNOR TO EASTMAN KODAK COM- PANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK ULTRA-VIOLET SENSITIVE PAPER No Drawing. Application filed April 27,
This invention relates to photo-sensitive paper, the sensitivity of which lies chiefly in 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 ultraviolet radiation of sunl ght and of various artificial light sources, particularly those used therapeutically. It is an object of this invention to produce such a paper.
Under the influence of ultra-violet l ght, ortho-nitrobenzaldehyde undergoes molecu lar rearrangement to orth-nitroso-benzoic acid. By using a suitable indicator with ortho-nitro-benzaldehyde,I have been able to produce a paper which is sensitive primarily to the ultra-violet and which has very little sensitivity in the visible spectrum. On 625- posure to ultra-violet light this paper gives within a short time a visible color change showing the transformation or rearrangement just described.
A test paper suitable for determining the intensity of ultra-violet light may be made by dipping sheets of unsized paper into a solution of Example I Ortho-nitro-benzaldehyde 1 gram Lacmoid 0.1 gram Ethyl alcohol 100 0.0.
Under the influence of ultra-violet this paper changes from blue to pink, and an exposure of about one minute is normally sufficient to produce a good color change.
Another suitable formula is the following:
Papers may be made with such solutions by either dipping or floating the sheets of paper upon the solution, then withdrawing and drying. Sized paper will, as a rule, not
1931. Serial No. 533,365.
as t will be evident that other substances are available for producing a satisfactory result;
What I claim as my invention and desire to secure by Letters Patent of the United States is:
1. A photo-sensitive sheet sensitive primarily to the ultra-violet comprising orthonitro-benzaldehyde. I
2. A photo-sensitive sheet sensitive primarily to the ultra-violet comprising orthonitro-benzaldehyde and an indicator.
3. A photo-sensitive sheet sensitive primarily to the ultra-violet comprising orthonitro-benzaldehyde and an indicator, which gives on exposure a visible color change.
Signed at Rochester, New York, this 20th day of April, 1931.
LEON W. EBERLIN.
US533365A 1931-04-27 1931-04-27 Ultra-violet sensitive paper Expired - Lifetime US1878684A (en)

Priority Applications (1)

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US533365A US1878684A (en) 1931-04-27 1931-04-27 Ultra-violet sensitive paper

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US1878684A true US1878684A (en) 1932-09-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105761A (en) * 1958-09-19 1963-10-01 Ncr Co Photo-printing process including a light filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105761A (en) * 1958-09-19 1963-10-01 Ncr Co Photo-printing process including a light filter

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