CH245394A - Process for the production of screened positives and negatives with a screen-free background. - Google Patents

Process for the production of screened positives and negatives with a screen-free background.

Info

Publication number
CH245394A
CH245394A CH245394DA CH245394A CH 245394 A CH245394 A CH 245394A CH 245394D A CH245394D A CH 245394DA CH 245394 A CH245394 A CH 245394A
Authority
CH
Switzerland
Prior art keywords
negatives
screen
production
free background
positives
Prior art date
Application number
Other languages
German (de)
Inventor
Liebowitz Benjamin
Original Assignee
Liebowitz Benjamin
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 Liebowitz Benjamin filed Critical Liebowitz Benjamin
Publication of CH245394A publication Critical patent/CH245394A/en

Links

Classifications

    • G—PHYSICS
    • 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
    • G03F5/00—Screening processes; Screens therefor
    • G03F5/24—Screening processes; Screens therefor by multiple exposure, e.g. combined processes for line photo and screen
CH245394D 1941-07-29 1942-05-29 Process for the production of screened positives and negatives with a screen-free background. CH245394A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US404572A US2315101A (en) 1941-07-29 1941-07-29 Dropout half-tone negative

Publications (1)

Publication Number Publication Date
CH245394A true CH245394A (en) 1946-11-15

Family

ID=23600146

Family Applications (1)

Application Number Title Priority Date Filing Date
CH245394D CH245394A (en) 1941-07-29 1942-05-29 Process for the production of screened positives and negatives with a screen-free background.

Country Status (2)

Country Link
US (1) US2315101A (en)
CH (1) CH245394A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL244112A (en) * 1958-06-11
US3031303A (en) * 1959-06-03 1962-04-24 Arthur L Huttkay Drop-out process for halftone photography
US3204520A (en) * 1960-07-28 1965-09-07 Eltra Corp Apparatus for manufacturing font plates for phototypographical machines
US3890148A (en) * 1971-07-30 1975-06-17 Howson Algraphy Ltd Exposure of light-sensitive materials

Also Published As

Publication number Publication date
US2315101A (en) 1943-03-30

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