US2291673A - Production of printing forms - Google Patents

Production of printing forms Download PDF

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Publication number
US2291673A
US2291673A US287858A US28785839A US2291673A US 2291673 A US2291673 A US 2291673A US 287858 A US287858 A US 287858A US 28785839 A US28785839 A US 28785839A US 2291673 A US2291673 A US 2291673A
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US
United States
Prior art keywords
layer
coating
gelatin
printing
colloid
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
US287858A
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English (en)
Inventor
Albers Fritz
Schloemann Eduard
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.)
GAF Chemicals Corp
Original Assignee
General Aniline and Film Corp
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 General Aniline and Film Corp filed Critical General Aniline and Film Corp
Application granted granted Critical
Publication of US2291673A publication Critical patent/US2291673A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/12—Printing plates or foils; Materials therefor non-metallic other than stone, e.g. printing plates or foils comprising inorganic materials in an organic matrix
    • B41N1/14—Lithographic printing foils

Definitions

  • Our present invention relates to the producglogn of printing forms, particularly for flat print-
  • a known process for producing forms for flat printing consists in writing by hand or by typewriter on a colloid layer capable of being hardened with a hardening ink.
  • the layer is.then rolled with a fatty color which adheres only to the hardened parts.
  • the script is then transferred by pressure to paper or the like.
  • the colloid layer may be sensitized with bichromate and printed with a pattern by first expo in the layer to light through a copy. whereby the gelatin is hardened only at those parts which have been illuminated.
  • the printing is performed as described above, namely by rolling the surface with a printing color which adheres only to the hardened parts.
  • the process has the disadvantage that after the pattern or script has been applied corrections of the script on the printing layer cannot be made without damaging the surface of the printing material.
  • Our invention has for one object to avoid this disadvantage by providing a colloid layer capable of being hardened with a coating i-mpermeable to a hardening bath.
  • Another object of our invention is to provide a. colloid layer capable of being hardened and having a coating of such a degree of softness that by a locally limited pressure the underneath colloid layer is exposed. After application of the pattern the colloid layer is hardened in known manner and the coating removed.
  • a further object of this invention is the provision of a colloid layer which contains for the purpose of obtaining a better adhesion of the printing color to the said colloid layer a substance which imparts to its surface a certain porosity and roughness.
  • silicates for instance kieselguhr, are especially suitable.
  • the colloid layer may be given sufficient mechanical strength for the printing by supporting it on a carrier which may be of paper or of sheets of known artificial materials, such as Celluloid, Cellophane (registered trade-mark), acetyl cellulose, polymerized vinylchloride, polymerized styrene or the like.
  • a carrier which may be of paper or of sheets of known artificial materials, such as Celluloid, Cellophane (registered trade-mark), acetyl cellulose, polymerized vinylchloride, polymerized styrene or the like.
  • a carrier which may be of paper or of sheets of known artificial materials, such as Celluloid, Cellophane (registered trade-mark), acetyl cellulose, polymerized vinylchloride, polymerized styrene or the like.
  • colloid layer may be supespecially high the sheet (for instance, aluminported on a'metal ium sheet) which, the colloid layer, may be roughened
  • the coating may cona lacquer made from cellulose derivative'or the like in order to make it stable in the hardening bath.
  • the mechanical requirements are 5 sist of natural or artificial resins, cellulose derivatives or the like, of sufficient degree of softness. If necessary the degree of softness may be procured by the addition of the necessary proportion of a softening agent (for instance, tricresyl phosphate, natural or artificial waxes).
  • the coating is to be so soft that by a locally limited pressure, for instance by the blow ofa typing lever, the coating is pressed aside and the underlying colloid layer is exposed.
  • the colloid layer becomes visible as the script or drawing and these parts can be hardened in known manner by bathing the layer in a hardenin solution. After removing the coating layer by means of a bath of a solvent for the coating or in any other manner, such as by peeling, scratching or the like, and then moistening and rolling with a fatty color, the printing form thus made can be used for printing. A correctly orientated reproduction is obtained by performing the printing in a similar manner as used offset printing.
  • the process has the special advantage that after the script or drawing or the like has been produced on the surface it is easy to make corrections by again applying the coating where the mistakes are and repeating the writing or drawing.
  • Theprocess is suitable when modified in obvious manner for producing high relief and basrelief printing forms.
  • the colloid for the better adhesion of is hardened throughout at the ing with the script or drawing.
  • Example 1 On the baryta layer of a barytized paper lacquered on both sides there is applied first a gelatin layer and on this the following solution:
  • Example 2 On the baryta layer of a barytized paper lacquered on both sides there is applied a gelatin layer containing kieselguhr. On this layer there is cast the following solution:
  • Example 3 On the baryta layer of a paper barytized and lacquered on both sides there is applied first a gelatin layer and on this the following solution:
  • Example 4 On the baryta layer of a barytized paper lacquered on both sides there layer containing kieselguhr. On this layer there is cast the following mixture:
  • a process of producing a printing form from a printing material provided with a colloid layer said colloid being capable of being hardened
  • the improvement which comprises applying on the surface of said colloid layer a coating impermeable to hardening baths and having such a degree of softness that said colloid layer is exposed by a locally limited pressure on said coating, applying a recording on said coating so as to expose said colloid layer at the parts of recording, hardening said colloid layer in a hardening bath, and removing said coating by washing 2.
  • a process of producing a printing form from a printing material provided with a gelatin layer the improvement which comprises applying on the surface of said gelatin layer a coating impermeable to hardening baths and having such a degree of softness that said gelatin layer is expoud by a locally limited pressure on said coating, applying a recording on said coating so as to expose said gelatin layer at the parts of recording, hardening said gelatin layer in a hardening bath, and removing said coating by washing.
  • a process of producing a printing form from a printing material provided with a gelatin layer the improvement which comprises applying on the surface of said gelatin layer a bluecolored coating comprisinga mixture of polymerized styrene and mineral oil and having such a degree of softness that said gelatin layer is exposed by a locally limited pressure on said coating, applying a recording on said coating 50 as to expose said gelatin layer at the parts of recording, hardening said gelatin layer in a hardening bath, and removing said coating by washing.
  • a blackcolored coating comprising a mixture of chlorocaoutchouc, chlorinated diphenyls, stearin pitch, and higher aliphatic alcohols with 10 to 14 C-atoms, and having such a degree of softness that said gelatin layer is exposed by a locally limited pressure on said coating, applying a recording on said coating so as to expose said gelatin layer at the parts of recording, hardening said gelatin layer in a hardening bath, and removing said coating by washing.
  • a printing material consisting of a support and two superimposed layers on one side of said support, the layer next to said support being essentially of a colloid capable of being hardened,
  • the upper layer being impermeable to hardening baths and having such a degree of softness that said colloid layer is exposed by a locally limited pressure on said upper layer and selected from the class consisting of resins and cellulose derivatives.
  • a printing material consisting of a paper layer and two superimposed layers on one side of said paper layer, the layer next to said paper layer being essentially of a colloid capable of being hardened, the upper layer being impermeable to hardening baths and having such a degree of softness that said colloid layer is exposed by a locally limited pressure on said upper layer and selected from the class consisting of resins and cellulose derivatives.
  • a printing material consisting of a paper layer and two superimposed layers on one side of said paper layer, the layer next to said paper layer being essentially of a colloid capable of being hardened containing a substance imparting roughness to the surface thereof, the upper layer being impermeable to hardening baths and having such a degree of softness that said colloid layer isexposed by a locally limited pressure on said upper layer and selected from the class consisting of resins and cellulose derivatives.
  • a printing material consisting of a paper layer and two superimposed layers on one side of said paper layer, the layer next to said paper layer being essentially of a colloid capable of being hardened containing a substance imparting roughness to the surface thereof, the upper layer being colored and impermeable to hardening baths and having such a degree of softness that said colloid layer is exposed by a locally limited pressure on said upper layer and selected from the class consisting of resins and cellulose derivatives.
  • a printing material consisting of a paper layer lacquered on both sides, a layer consisting of a colloid capable of being hardened and a substance imparting roughness to the surface thereof and fixed on one side of said paper layer, a colored coating layer coveringsaid colloid layer and being impermeable to hardening baths and having such a degree of softness that said colloid layer is exposed by a locally limited pressure on said coating layer and selected from the class consisting of resins and cellulose derivatives.
  • a printing material consisting of a metal layer provided on both sides with a paper coating, a layer consisting of a colloid capable of being hardened and a substance imparting roughness to the surface thereof and fixed on one side of said metal layer, a colored coating layer covering said colloid layer and being impermeable to hardening baths and having such a degree of softness that said colloid layer is exposed by a locally limited pressure on said coating layer and selected'from the class consisting of resins and cellulose derivatives.
  • a printing material consisting of a support and two superimposed layers on one side of said support, the layer next to said support being essentially of gelatin, the upper layer blue-colored comprising a mixture of collodion and trlcresyl phosphate and having such a degree of softness that said gelatin layer is exposed by a locally limited pressure on said upper layer.
  • a printing material consisting of a support and two superimposed layers on one side of said support, the layer next to said support being essentially of gelatin, the upper layer blue-colored comprising a mixture of polymerized styrene and ineral oil and having such a degree of softness that said gelatin layer is exposed by a locally limited pressure on said upper layer.
  • a printing material consisting of a support and two superimposed layers on one side of said support, the layer next to said support being essentially of gelatin, the upper layer black-colored comprising a mixture of chlorocaoutchouc,

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  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Printing Plates And Materials Therefor (AREA)
US287858A 1938-08-12 1939-08-02 Production of printing forms Expired - Lifetime US2291673A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2291673X 1938-08-12

Publications (1)

Publication Number Publication Date
US2291673A true US2291673A (en) 1942-08-04

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Application Number Title Priority Date Filing Date
US287858A Expired - Lifetime US2291673A (en) 1938-08-12 1939-08-02 Production of printing forms

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US (1) US2291673A (xx)
BE (1) BE435880A (xx)
FR (1) FR858978A (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635537A (en) * 1950-07-19 1953-04-21 Warren S D Co Paper planographic printing plate with stabilized hydrophilic coating
US2962961A (en) * 1950-03-28 1960-12-06 Dilith Corp Method of forming a printing plate
US2983220A (en) * 1955-03-16 1961-05-09 Timefax Corp Electro-sensitive planographic printing plate
US3113512A (en) * 1948-12-20 1963-12-10 Columbia Ribbon & Carbon Planographic printing
US3139825A (en) * 1962-04-05 1964-07-07 Eastman Kodak Co Method for preventing silicon dioxide contamination of lithographic printing masters

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113512A (en) * 1948-12-20 1963-12-10 Columbia Ribbon & Carbon Planographic printing
US2962961A (en) * 1950-03-28 1960-12-06 Dilith Corp Method of forming a printing plate
US2635537A (en) * 1950-07-19 1953-04-21 Warren S D Co Paper planographic printing plate with stabilized hydrophilic coating
US2983220A (en) * 1955-03-16 1961-05-09 Timefax Corp Electro-sensitive planographic printing plate
US3139825A (en) * 1962-04-05 1964-07-07 Eastman Kodak Co Method for preventing silicon dioxide contamination of lithographic printing masters

Also Published As

Publication number Publication date
FR858978A (fr) 1940-12-07
BE435880A (xx)

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