US1818080A - Print - Google Patents

Print Download PDF

Info

Publication number
US1818080A
US1818080A US291672A US29167228A US1818080A US 1818080 A US1818080 A US 1818080A US 291672 A US291672 A US 291672A US 29167228 A US29167228 A US 29167228A US 1818080 A US1818080 A US 1818080A
Authority
US
United States
Prior art keywords
plate
tints
printing
copy
map
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
US291672A
Other languages
English (en)
Inventor
Miller Osborn Maitland
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
Priority to US291672A priority Critical patent/US1818080A/en
Priority to GB26916/28A priority patent/GB315257A/en
Priority to FR677883D priority patent/FR677883A/fr
Priority to DEM111006D priority patent/DE506414C/de
Application granted granted Critical
Publication of US1818080A publication Critical patent/US1818080A/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
    • G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
    • G03F1/88—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof prepared by photographic processes for production of originals simulating relief
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/152—Making camera copy, e.g. mechanical negative
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/153—Multiple image producing on single receiver

Definitions

  • This invention relates to prints and to the production of accurately graded half-tone tints from untinted drawings for conventional representation and is herein illustrated as applied to the production of hypsometric tints on contour maps.
  • tints on maps have been obtained by successive printings with different color plates.
  • Such tints as are recommended for the International map of the world require six color plates for land and two more plates for water, besides the three base plates, black, red and blue, for cultural detail.
  • Some of these tint colors are preferably printed both from a light and a heavy plate. with the result that as many as nineteen impressions may be used in printing a single sheet.
  • the process is slow, eX- pensive, and offers many opportunities for spoiling the work, especiallyfrom imperfect register of the many successive impressions.
  • the hypsometric tints of the map are shown as evenly toned areas of variously graded half- -tones usually printed from a single plate, though, if it is desired, different cultures may be shown in different colors of graded half tone, such as green for forest, and uncultivated land in sepia, or other conventionalized tints.
  • the alternation of the worksheet consists in altering the area of the next contour by either painting it over with black or else removing a black surface therefrom.
  • One incomplete exposure is made before the altering of the surface of all the area of the map and leaves a faint developable latent image on the sensitized surface.
  • the second exposure of the sensitized surface causes the surface of the worksheet, where black, to leave the same latent image, while the unaltered unblackened surfaces add to the faint latent image with the result that the parts of the sensitized surface which have twice received the impress of an unblackened surface have a latent image of increased depth.
  • the area of another contour interval is then altered as by blackening and the sensitized surface receives the impress of the map, adding further to the latent image in unblackened parts.
  • the process is thus repeated until the shades of the map are complete in the latent image of the sensitized surface.
  • the image is developed in the usual way. From this image showing the graded tints in positive values the printing plate is made in any desired or usual manner for printing the half tones in printing ink.
  • the desired tints are obtained by rendering non-actinic successive area of the secondary copy as by blackening to prow due-e by photography a positive copy showing the required hypsometric tints, but as will hereinafter appear, the desired successive tints may also be obtained by a reversal of the procedure, viz. by scraping off the areas successively from a copy negative, with intervening incomplete exposures to successively build up a latent image of the parts not scraped away, increasing with the number of incomplete exposures.
  • Figure 1 is a sectional side View, largely diagrammatic, of an apparatus used in carrying out one form of my process.
  • Figure 2 is a schematic diagram summarizing one procedure for producing the desired maps, in which a positive print of the required tints is built up by photography from a positive copy.
  • Figure 3 is a schematic diagram summarizing an alternative procedure, in which a halt tone negative or the required tints is built up by photography from a negative copy.
  • Figure is a schematic diagram summarizing another alternative procedure in which a halt tone negative or the required tints is built up by photography from a positive py
  • Figure 5 is a schematic diagram summarix ing another alternative procedure resembling the procedtne of Figure -l but especially adapted for commercial practice.
  • Method 1 According to one form of the present invention illustrated in Figure 2, there made from the draftsmans finished copy con mining the conventional lines and, in a map, contour lines, one negative as a starting point'tor the plate oi uniformly graded tints and another identical negative as a starting point for the line plate. Both of these negatives are made, as usual. with the image reversed, that is with an image which is the reflection of the original, so that left hand is right hand and right hand, left hand.
  • the altering 01 successive areas to render ieni uon-ac'inic and the printing of incomplete images are then continued until all the desired tints are represented in the latent image, after which the image developed and tired on the opal glass plate.
  • the opal. glass print a reversed print shows the conventional black lines of the finished map or diagram as white lines against the tinted ba' ground so that when the line plate iniprc sion is made on the linished print there will be no overlapping of lines and tinted areal-5.
  • the tops 01? the hills may be light and valleys dark. instead of the contrary which is now. customary.
  • the dark valleys now eed not masl: the cultural line details.
  • This glass print is now shade or tint copy. roin this tint copy is made in an ordinary ialit tone camera a negative of the required ants, which will be an unreversed negative. rem this last-named negative is made by ntact 1:2riuting the halt-tone ositive plate 7on1 which the tints are printed in a print- .ng press on the proof of the map or dia-
  • the reversed negative made as a starting point for the line printing plate is turned, or stripped, reversed and remounted, and then from it is made in any usual or desired manner, as by contact printing, the positive line printing plate from which the conventional black or other lin of the map are printed in a printing press.
  • the linishcd print shows tints as evenly shaded half tone shades with the lines printed in left blank inprinting the half tone tints.
  • the map or diagram shows a scale of the tints printed with adjacent numerical values.
  • Method II According to one procedure for carrying out an alternative method, shown schematically in Figure 3, two identical reversed negatives are made, one as a starting point for the graded tints plate, and the other for line printing plate.
  • the half tonecamera 1 with a shu-tter 2, a lens '3, variable diaphragm l, bellows 5, and screen "6, is firmly mounted on the usual base 7 so that it can be focussed. Behind the screen '6 is the sensitive plate 8 which will form the half-tone negative.
  • the camera is focuss'ed on the secondary copy 9 which is mounted in a swinging frame it), carefully built to be swung up repeatedly to focussing position and accurately adjusted there by a stop and lock 11.
  • thesecondary copy 9 is swung down in its frame 10 so as to rest on the base 7. Then the operator cuts away the partsof the image in the secondary copy whichare to appear as the lightest tint in the finished map or diagram. The secondary copy'is then swung up and a second incomplete exposure made, sufficient to make a new latent image on the plate in the camera of the area in which it will-show the shade neXt lighter than black and to add to the first latent image.
  • the plate for printing the dines-of the drawing is made from the second identical negative'mentioned above,precisely as in the iirs't method and used for printing in the same way.
  • the plate 'for printing the lines on'the map is made directly from the same turned negative which was used for printing the faintlined secondary copy.
  • half tone tint printing plate and the line printing plate should register 'eXa'ctly as both have been made from the same turned negative without any further' turning.
  • Method IV According to a fourth method shown schematically in Figure 5, twos'econdary "copies or worksheets are prepared, "one for the hal-f' tone tint plate and one for-the line plate.
  • the other reversed contact blue print on secondary copy for making the line plate shows on a blue ground the white lines of the original copy. These lines are inked in by a daughtsman in waterproof ink, and then, if necessary, the blue is bleached. From this inked-in plate is made the line printing plate.
  • the unreversed half-tone negative may be used in preparing as many half-tone positive printing plates as are needed for printing the various desired colors on the print. They may be used, for example. to print on a map colors indicating different cultures, such as forested and cultivated land, in different colors but in exactly corresponding hypsometric tints. To make a plate for printing only part of the print in a given color, the area of the printing plate which should not print may be rented or cut away, and the plate which prints another color is rented or cut away at the area where the first plate prints, and so for several plates. Line printing plates may be cut away in similar fashion to print any desired areas in any selected colors.
  • the latent image formed is not directly proportional to the time of exposure or to the amount of light falling on a sensitized surface, so, to make uniformly graded tints from any given emulsion, the time of exposure or the diaphram, or both must be varied according to the characteristics of the emulsion and the time of development.
  • the emulsions may be carried on any suitable backing. Glass has been named because it is usually most satisfactory, since it does not swell or shrink, but paper positives or celluloid negatives may be used for rough work.
  • a print having both solid line representations and evenly graded. half tone representations, the solid lines being printed independently in spaces substantially empty of half tone printing.
  • a printed map showing by even half ones of the same color but of diiierent densiies proportional representations of the same henomena, as differences of elevation or denof population, and lines of solid color rinted in spaces substantially free of half tone densities and separating the different densities.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
US291672A 1928-07-10 1928-07-10 Print Expired - Lifetime US1818080A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US291672A US1818080A (en) 1928-07-10 1928-07-10 Print
GB26916/28A GB315257A (en) 1928-07-10 1928-09-19 Improvements in or relating to photomechanical printing processes and to the production of maps and diagrams thereby
FR677883D FR677883A (fr) 1928-07-10 1929-07-04 Procédé de fabrication des planches pour l'impression en demi-teinte des cartes en relief et des objets analogues
DEM111006D DE506414C (de) 1928-07-10 1929-07-11 Verfahren zur Herstellung von Drucken, insbesondere von Landkarten mit genau bagestuften Halbtonfaerbungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US291672A US1818080A (en) 1928-07-10 1928-07-10 Print

Publications (1)

Publication Number Publication Date
US1818080A true US1818080A (en) 1931-08-11

Family

ID=23121322

Family Applications (1)

Application Number Title Priority Date Filing Date
US291672A Expired - Lifetime US1818080A (en) 1928-07-10 1928-07-10 Print

Country Status (4)

Country Link
US (1) US1818080A (de)
DE (1) DE506414C (de)
FR (1) FR677883A (de)
GB (1) GB315257A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4108549A (en) * 1976-09-22 1978-08-22 Bureau De Recherches Geologiques Et Minieres Polychromic reproduction procedure using strippable masks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4108549A (en) * 1976-09-22 1978-08-22 Bureau De Recherches Geologiques Et Minieres Polychromic reproduction procedure using strippable masks

Also Published As

Publication number Publication date
GB315257A (en) 1929-12-19
FR677883A (fr) 1930-03-15
DE506414C (de) 1930-09-03

Similar Documents

Publication Publication Date Title
US2455849A (en) Photographic unsharp masking method
US4553835A (en) Process for producing pre-press color proofs
US4037533A (en) Color lithography using a random pattern screen
US4483916A (en) Improving the color balance of multicolor prints by exposure through contrast reducing light distribution means
DE2805874A1 (de) Verfahren zum uebertragen einer vorlage auf eine tiefdruckform
US1818080A (en) Print
US2050552A (en) Color photography
US2577984A (en) Method of making color printing plates
US2048876A (en) Method of preparing printing plates
US2165407A (en) Color correction
US2971841A (en) Process for the production of color separation negatives or positives for color reproduction
US4870455A (en) Pre-press color proof system having improved tonal range in highlight areas (pin dot detail)
US3022164A (en) Reproduction of color drawings, film transparencies and photographs
US2183143A (en) Method of preparing color-printing plates
US2362826A (en) Process of producing dropout half-tone negatives
US2349819A (en) Multicolor printing
US2176518A (en) Photomechanical color process
US2019500A (en) Article and method by which "ben day" tones are photographically produced
US2124680A (en) Surprinting
US3212891A (en) Method of correcting a half-tone print for reproduction
US4774165A (en) Method for direct making of lithographic printing plates
US1957970A (en) Method of photographically producing "ben day" tones
US2161378A (en) Color separation process for multicolor printing
US2021191A (en) Article and method by which "ben day" tones are photographically produced
GB238862A (en) Improved method of securing accurate colour values in colour printing and colour photography