GB844085A - Improvements relating to planographic printing plates - Google Patents

Improvements relating to planographic printing plates

Info

Publication number
GB844085A
GB844085A GB771/58A GB77158A GB844085A GB 844085 A GB844085 A GB 844085A GB 771/58 A GB771/58 A GB 771/58A GB 77158 A GB77158 A GB 77158A GB 844085 A GB844085 A GB 844085A
Authority
GB
United Kingdom
Prior art keywords
coating
cellulose
oxidised cellulose
planographic printing
jan
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
GB771/58A
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.)
AB Dick Co
Original Assignee
Multigraphics Inc
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 Multigraphics Inc filed Critical Multigraphics Inc
Publication of GB844085A publication Critical patent/GB844085A/en
Expired legal-status Critical Current

Links

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
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • B41N3/036—Chemical or electrical pretreatment characterised by the presence of a polymeric hydrophilic coating

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Abstract

844,085. Printing surfaces. ADDRESSOGRAPH-MULTIGRAPH CORPORATION. Jan. 8, 1958 [Jan. 25, 1957], No. 771/58. Class 100(2) A planographic printing plate comprises a flexible supporting base sheet having thereon a printing surface in the form of a coating of waterinsolubilized oxidised cellulose. Preferably the oxidised cellulose is pigmented and the base sheet is provided with a wet-strength basic coating. In an example a coating of 5 grams of pigment (finely divided alumina), 8 c.c. of ammonium hydroxide, 1 gm. of oxidised cellulose (prepared by treating cellulose with nitrogen tetroxide) and 99.2 c.c. of water was applied to a sheet of 10" x 15". The coating may be insolubilized by heating to about 90‹C, but is preferably insolubilized by means of a weak solution of a mineral acid such as phosphoric acid, the plate afterwards being heated, rinsed and dried. More than one coating of oxidised cellulose may be employed.
GB771/58A 1957-01-25 1958-01-08 Improvements relating to planographic printing plates Expired GB844085A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63623457A 1957-01-25 1957-01-25
US4851A US3031957A (en) 1957-01-25 1960-01-27 Printing plates

Publications (1)

Publication Number Publication Date
GB844085A true GB844085A (en) 1960-08-10

Family

ID=26673581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB771/58A Expired GB844085A (en) 1957-01-25 1958-01-08 Improvements relating to planographic printing plates

Country Status (2)

Country Link
US (1) US3031957A (en)
GB (1) GB844085A (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2132443A (en) * 1936-08-24 1938-10-11 Francis L Simons Planographic plate and method
NL49764C (en) * 1937-09-01
BE472881A (en) * 1943-01-08
BE529582A (en) * 1945-03-08
US2498207A (en) * 1945-09-06 1950-02-21 Champion Paper & Fibre Company Paper coating composition and coated paper
US2542784A (en) * 1945-09-21 1951-02-20 Addressograph Multigraph Planographic printing plate and method of preparing the same
US2758112A (en) * 1951-09-21 1956-08-07 Nyma Kunstzijdespinnerij Nv Process for the preparation of oxidation products of cellulose

Also Published As

Publication number Publication date
US3031957A (en) 1962-05-01

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