GB157216A - Improvements in photomechanical printing processes - Google Patents

Improvements in photomechanical printing processes

Info

Publication number
GB157216A
GB157216A GB109021A GB109021A GB157216A GB 157216 A GB157216 A GB 157216A GB 109021 A GB109021 A GB 109021A GB 109021 A GB109021 A GB 109021A GB 157216 A GB157216 A GB 157216A
Authority
GB
United Kingdom
Prior art keywords
printing
forms
exposed
under
over
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
GB109021A
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.)
FRANZ HANFSTAENGL
Original Assignee
FRANZ HANFSTAENGL
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 FRANZ HANFSTAENGL filed Critical FRANZ HANFSTAENGL
Publication of GB157216A publication Critical patent/GB157216A/en
Expired legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Methods (AREA)

Abstract

157,216. K³hn, H., and Hanfstaengl, F., [Firm of]. Nov. 13, 1915, [Convention date]. Photo-mechanical printing-surfaces.-To enable photographic copies to be made of any object with accurate reproduction of the gradations of tonevalues both as to light and shade two printing forms or layers are used, one being over exposed and the other under exposed, these two being complementary to each other in furnishing a print with all shades in their true values. Theprinciple is applicable for single or multi-colored light printing or for oil or bromide-oil reprinting with a plurality of forms. The forms for printing may be obtained from the same negative by printing with different durations. Where large contrasts between high lights and shades exist two negatives face to face may be exposed simultaneously separated by thin filter to get under and over exposed negatives. Diapositives from these may be used for printing an enlarged negative from which the printing forms for use are made by over and under printing. Reference has been directed by the Comptroller to Specification 13103/84.
GB109021A 1915-11-13 1921-01-08 Improvements in photomechanical printing processes Expired GB157216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE157216X 1915-11-13

Publications (1)

Publication Number Publication Date
GB157216A true GB157216A (en) 1922-04-10

Family

ID=5678438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB109021A Expired GB157216A (en) 1915-11-13 1921-01-08 Improvements in photomechanical printing processes

Country Status (1)

Country Link
GB (1) GB157216A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5302924A (en) * 1991-06-25 1994-04-12 Lk-Products Oy Temperature compensated dielectric filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5302924A (en) * 1991-06-25 1994-04-12 Lk-Products Oy Temperature compensated dielectric filter

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