GB232306A - Process for the developing and copying of film strips with sound records - Google Patents

Process for the developing and copying of film strips with sound records

Info

Publication number
GB232306A
GB232306A GB66324A GB66324A GB232306A GB 232306 A GB232306 A GB 232306A GB 66324 A GB66324 A GB 66324A GB 66324 A GB66324 A GB 66324A GB 232306 A GB232306 A GB 232306A
Authority
GB
United Kingdom
Prior art keywords
underexposed
negative
positive
records
light
Prior art date
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
Application number
GB66324A
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.)
JOSEPH ENGL
Original Assignee
JOSEPH ENGL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JOSEPH ENGL filed Critical JOSEPH ENGL
Priority to GB66324A priority Critical patent/GB232306A/en
Publication of GB232306A publication Critical patent/GB232306A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor

Landscapes

  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

232,306. Engl, J., Vogt, H., and Massolle, J. Jan. 9, 1924. Drawings to Speci. fication. Photographic records.-Relates to the production of photographic sound records, particularly when the record is made on a picture film. The negative sound record is underexposed, on account of the speed of the film and the small intensity of the light, but the positive, which must be comparatively transparent, is obtained by a normal printing exposure. According to the invention, in order to obtain, under these conditions, a correct relationship between the recording beam and the reproduced beam, the development of the underexposed negative is abnormally prolonged, so that the positive produced therefrom is similarly underexposed. The developer used for the negative is preferably one which produces great contrasts, and known means for preventing fogging are used. In the positive, the density is such that portions which correspond to the average recording intensity absorb approximately 50 per cent of the light from the source, used in the reproducing apparatus. Explanatory graphs accompany the Specification.
GB66324A 1924-01-09 1924-01-09 Process for the developing and copying of film strips with sound records Expired GB232306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB66324A GB232306A (en) 1924-01-09 1924-01-09 Process for the developing and copying of film strips with sound records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB66324A GB232306A (en) 1924-01-09 1924-01-09 Process for the developing and copying of film strips with sound records

Publications (1)

Publication Number Publication Date
GB232306A true GB232306A (en) 1925-04-09

Family

ID=9708315

Family Applications (1)

Application Number Title Priority Date Filing Date
GB66324A Expired GB232306A (en) 1924-01-09 1924-01-09 Process for the developing and copying of film strips with sound records

Country Status (1)

Country Link
GB (1) GB232306A (en)

Similar Documents

Publication Publication Date Title
US1840351A (en) Sound record and method of producing the same
GB232306A (en) Process for the developing and copying of film strips with sound records
US2912327A (en) Prescreened negative photographic material
US2102021A (en) Photographic half-tone screen material and process
US1988812A (en) Sound negative for direct production of sounds
US1756863A (en) Method of making motion-picture films
US1904449A (en) Sound record film and film printing apparatus
USRE20582E (en) Art of composite photography
US2030760A (en) Method and means for the recordation of sound
US2056508A (en) Art of composite photography
US2196110A (en) Process of producing sound films
US2541490A (en) Tone control in photographic development
Zwick et al. A 16mm color internegative film for use in color motion-picture photography
Coffman Sound film processing
Alink et al. The Metal-Diazonium System for Photographic Reproductions
US1445412A (en) Process for producing sound waves
US1969451A (en) Sound reproduction
US1928392A (en) Recordation and reproduction of sound and the process thereof and apparatus therefor
GB404742A (en) Improvements in the production of photographic records of sound
US2553841A (en) Cinematographic apparatus
US1869414A (en) Sound reproducing apparatus
US2711372A (en) Photomechanical processes
US2357665A (en) Photographic sound record system and record
Corbin et al. Two new Eastman fine-grain sound recording films
US1608261A (en) Ergon