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
GB27636/31A
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Individual
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Individual
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Publication of GB390509ApublicationCriticalpatent/GB390509A/en
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
G03F3/00—Colour separation; Correction of tonal value
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Paints Or Removers
(AREA)
Abstract
390,509. Optical sound-records. VOGT, H., 17, Genthinerstrasse, Berlin. Oct. 5, 1931, No. 27636. Convention date, Oct. 7, 1930. [Class 40 (ii).] A sound-record suitable for photo-electric reproduction is made on a film of cellulose hydrate by a mechanical printing process. A negative record of the varying width type is first made by the. usual photographic recording process, and from this a relief record is made on a bichromate gelatine film to serve as a printing clichÚ. Printing ink or the like, which may consist of soot, colloidal graphite, or mineral colours, is then transferred to the cellulose film in known manner. Specification 331,278, [Class 40 (ii), Phonographs &c.], is referred to.
GB27636/31A1930-10-071931-10-05Improvements in or relating to optical sound records
ExpiredGB390509A
(en)