US1785997A - Method of securing accurate color values in color printing and color photography - Google Patents

Method of securing accurate color values in color printing and color photography Download PDF

Info

Publication number
US1785997A
US1785997A US46668A US4666825A US1785997A US 1785997 A US1785997 A US 1785997A US 46668 A US46668 A US 46668A US 4666825 A US4666825 A US 4666825A US 1785997 A US1785997 A US 1785997A
Authority
US
United States
Prior art keywords
color
films
frames
printing
photography
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 - Lifetime
Application number
US46668A
Other languages
English (en)
Inventor
Blecher Carl
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1785997A publication Critical patent/US1785997A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G03F3/00—Colour separation; Correction of tonal value
    • G03F3/10—Checking the colour or tonal value of separation negatives or positives
    • G03F3/107—Checking the colour or tonal value of separation negatives or positives using silver halide photosensitive materials

Definitions

  • the object of this invention is to indicate a way, in which in the process of making printing copies for photographic, intaglio, lithographie or combnationprintin in co1- ors, and in the makingof negatives tor color photography the accurate reproduction of the 'colorsmay beobtained with certainty, without it being necessary in the case of the color print-ing processes referred to above.
  • the path to i; pursued differs according to whether for the purpose of color printing or color photography there is a series of part negatives 4or only a single negative, whereas the idea of the' present invention is used in both ways.
  • Figure 2 is an outer plate to be placed over it
  • Figure 3 is the outer upper plate to be placed over' the late of Figure 2;
  • Figure 4 is t e upper inner plate to be placed into the latter
  • Figure 5 shows a general plan of the plates of Flgure'l-et screwed (attached) to a base late p
  • Figure 6 is a section along 'VI-VI of Figure 5;
  • Figures 7,8 and 9 show the attaching means drawn to an enlarged scale.
  • the bottom image mav be made on a white support and affixed to the same, this support together with the bottom part image thereon is laid under the copies on thin stretched' films of the part negatives, which ⁇ are superposed in register with one another.
  • AIt is immaterial how the bottom copy and howother copies on films are ro-v cuted.
  • the copies ' may be colored re iefs obtained by dissolvin out or may be toned
  • b ack ure silver images images are superposed on one another' in the order, in which the a're to be subsequently united to form tl; finished picture,l as stated above either only on a white reflecting support or they are laid on the bottom colored art image.
  • the part images so obtained are to be hotographed, as explained below, it wil in ireferable to work over the colored interme ate image in-its own colorr used in When not a series of half-tone negatives' are used, but a single half-tone negative for producing a multi-color image, an intermediate image is made from this negative in the form of a copy for one color.
  • This'copy may be placed on a stretched film and the latter be provided with a white, reflecting support, or the copy is placed directly on a copying layer on a white support. ⁇
  • This partial image provides the outlines. On to this partial image are placed thin films, which are stretched 011 frames without images and on to these films the remaining desired part images (intermediate images) are drawn.
  • the arrangement it is in general much easier to in# includes four frames la, 1b, 1c, lol, to which are attached the colored copied films 2a, 2b, 20 and 2d.
  • the yellow field 3a is copied, on the film 2b the red field 8b, on the film 20 the blue field 3c, and on the film 2d the blackfield 3d, and in such a manner that the color fields 3a, 3b, 3c and 3d follow each other from right to left with the super- ⁇ imposed films 2a, 2b, 2c and 2d.
  • the color fields are not superimposed here, since they are recognizable by the intermediate shades resulting from the superimposed colorsv and may be readily understood, as in this example stress is laid only on an explanation of the manner of carrying out the process.
  • the frame la fits exactly in the frame 1b and the frame 1b in the frame 1c. rIhe frame la has an abutting projection 5a having two holes 6a and the frame 1d has two holes 6d, whereas the frames 1b and 1c have at their sides facing each other the projections b and 5c respectively.
  • the abutting projections and holes serve to fix the frames in a manner to be described hereafter.
  • the frames la, 1b and 1c have, in addition, reenforcing ridges 4 placed at some distance from the inner and outer ends, whereas the frame 1d is flat.
  • the color fields 3a to 3d are each arranged inside of a bounding line c', c, 0" and 6 and these bounding lines are congruent.
  • ⁇ bottom plate 22 serves as the fixing device for 'layer 2a.
  • the frame l There is then placed on the frame l?) the frame l0 and in such a manner that the film layer 20 lies directly on the film layer 2b and the edge 4 is turned upwards
  • the frame 2d is placed again with its film layer turned downward in the clear opening of the frame 20, so that it too rests directly on the layer 20, and all four layers 2a to 2d lie closely upon each other as is apparent from Figure 5, and thus reproduce the correctly assembled composite picture, when the four bounding lines o to 0 of the films 2a to 2d cover each other.
  • brackets 9 may be fixed on Yinsister the base plate 22 by means of screws 10, wing nuts 11 and Washers 11, which may be displaced a certain amount in all directions inside the openings 12, and which carry a vertical post 13, having in its center a longitudinal slot 14: open above.
  • Bolts 15 are inserted in these slots 14, carrying at one of their ends a pin (tommy) 16 and at their other end a screw thread on which is threaded a wing nut 17.
  • each bracket 9, respectively its post 13 is provided with a guide 18 and a projection 19, whereby the guide 18 fits into triangular grooves 18, which'are correspondin ly provided on the projections 5b, 5e and 13 of the plates 1b, 1c as well as on the connecting members 7a and 7 d.
  • the superposed lates lez- 1d are attached by means of the racket 9 with the base plate 22 and are thus fixed with regard to each other.
  • the plate la is fixed in a manner similar to the superposition of the plates let- 1d with the upper bracket 9 of the base plate by means of a connecting member 7 a, that contacts by means of pins 8 in the slots 6a of the plate 1a, and which is bent downwards (Figure 8) so that the pin (tommy) 16 lits behind the projection 13 of the connecting member and the projection 13 of the connect-ing member is drawn on tightly against the post 13 of the bracket 9 by means of the wing nut 17.
  • the guide 18 and the projection 19 thereby rigidly ⁇ fix the connecting member 7 a and as a result the plate 1a on the base plate 22.
  • An opening 20 is provided in the base plate 22 for the passage of the connecting member 7a ( Figures 5 and 6).
  • the plate 1b the right molding of which is somewhat wider than the rest, is thereupon so arranged that the bounding line c covers the bounding line c', the bracket 9 being then screwed on in the manner ldescribed with regard to the plate la directly against the projection 5b, and the nuts 11 of the bracket being drawn on tightly so that the plates 1a, 1b are fixed so that they cannot be displaced.
  • the plate 1c the left side of which is wider than the rest, is then arranged in a manner similar to the plate 1b, and is fixed.
  • the plate ld may be pressed with its free end upward and tightly against ⁇ the lower plates by means 'of afixed bolt 23, arranged in the base plate 22, to which is fastened, b means of a nut 24, the attachable arm 2.5 ⁇ aving a set screw 26. f y
  • the methodA according to the present invention diers considerably and very advantageously from the earlier method, in which intermediate images (intermediate positives) were also used.
  • intermediate images intermediate positives
  • the color values were controlled by black and white retouching.
  • the new method the image is presented to the observer in its full color effect more or less accurately. The color effect is lirst corrected and only after this has been done are the negatives for copying purposes made.
  • I claim l A method for securing accurate color valuesin color printing and color photography, ,characterized by the feature that for the colored part images to be placed together intermediate images are made in the respective colors on thin films stretched on frames.
  • a method of securing accurate color values in color printin and color photography characterized by t 1e feature that for the colored part images to be laced together intermediate ima es are ma e in the respective colors on thin lms stretched on frames, the separate frames for the different part images being of different size and adapted to be placed one in the other.
  • a method of securing accurate color values in color printing and color photography characterized by the feature that for the colored part images to be placed together intermediate images are made in the respective colors, the intermediate images, when being copied, being made with a shorter gradation than is to be shown by the finished colored part image.
  • a method of securing laccurate color values in color printing and color photography characterized by the feature that for the colored part images to-be placed together intermediate images are made in the respective colors on thin ilms stretched on frames and are photographed with a white reiecting support placed under them.
  • a method of securing accurate color values in color printing and color photography characterized by the feature that an intermediate image, which lies at the bottom and is already on a White support, s photographed to the same size as the intermediate images on thin films stretched on frames and having a white reflecting support under them.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Methods (AREA)
  • Projection-Type Copiers In General (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
US46668A 1924-08-20 1925-07-28 Method of securing accurate color values in color printing and color photography Expired - Lifetime US1785997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0115306 1924-08-20

Publications (1)

Publication Number Publication Date
US1785997A true US1785997A (en) 1930-12-23

Family

ID=6993989

Family Applications (1)

Application Number Title Priority Date Filing Date
US46668A Expired - Lifetime US1785997A (en) 1924-08-20 1925-07-28 Method of securing accurate color values in color printing and color photography

Country Status (4)

Country Link
US (1) US1785997A (OSRAM)
FR (1) FR600886A (OSRAM)
GB (2) GB238860A (OSRAM)
NL (2) NL17979C (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577984A (en) * 1945-11-08 1951-12-11 Warnecke Harry Walter Method of making color printing plates
US3144333A (en) * 1961-01-06 1964-08-11 Robert R Waldherr Photographic color film and the method of use in color printing
US4203360A (en) * 1977-05-05 1980-05-20 Madwed Steven R Method for silk-screen printing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577984A (en) * 1945-11-08 1951-12-11 Warnecke Harry Walter Method of making color printing plates
US3144333A (en) * 1961-01-06 1964-08-11 Robert R Waldherr Photographic color film and the method of use in color printing
US4203360A (en) * 1977-05-05 1980-05-20 Madwed Steven R Method for silk-screen printing

Also Published As

Publication number Publication date
NL20249C (OSRAM)
NL17979C (OSRAM)
FR600886A (fr) 1926-02-17
GB238860A (en) 1925-12-17
GB238862A (en) 1926-08-12

Similar Documents

Publication Publication Date Title
US2385599A (en) Color photography
US755983A (en) Color photograph and process of making same.
US1785997A (en) Method of securing accurate color values in color printing and color photography
US3913477A (en) Photogravure process for preparing a gravure press for multicolor printing
US3337343A (en) Process for color correction of color separation negatives for color lithography
US2703281A (en) Auxiliary screening apparatus and method for multicolor photogravure
US2902770A (en) Registering means for multicolor printing
US1786070A (en) Apparatus for making registered prints
US2577984A (en) Method of making color printing plates
US3772015A (en) Colour photography
US1788645A (en) Process for making photographs and camera device suitable for employment therewith
US4870455A (en) Pre-press color proof system having improved tonal range in highlight areas (pin dot detail)
US2975694A (en) Step and repeat apparatus
US3103436A (en) Acetate
US2789905A (en) Camera for producing screen positive
US2165407A (en) Color correction
US1435760A (en) Photographic-printing process
US2250873A (en) Method for forming photographic plates
US4183663A (en) Process for making multicolored photographic slides and apparatus therefor
US2129945A (en) Process of making color printing plates
US1446754A (en) Process of producing multicolor prints
US2186138A (en) Photography
US1885725A (en) Method for making multicolor printing plates
US2122859A (en) Process for making plates for color printing
US1530076A (en) Process and means for making color-printing plates