GB653367A - Improvements in or relating to the production of electro-types - Google Patents

Improvements in or relating to the production of electro-types

Info

Publication number
GB653367A
GB653367A GB2775148A GB2775148A GB653367A GB 653367 A GB653367 A GB 653367A GB 2775148 A GB2775148 A GB 2775148A GB 2775148 A GB2775148 A GB 2775148A GB 653367 A GB653367 A GB 653367A
Authority
GB
United Kingdom
Prior art keywords
parts
lubricant
copolymer
carbon black
per cent
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
GB2775148A
Inventor
Harry Harman Ball
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.)
Bakelite Ltd
Original Assignee
Bakelite Ltd
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 Bakelite Ltd filed Critical Bakelite Ltd
Priority to GB2775148A priority Critical patent/GB653367A/en
Publication of GB653367A publication Critical patent/GB653367A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C3/00—Reproduction or duplicating of printing formes
    • B41C3/08—Electrotyping; Application of backing layers thereon

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A thermoplastic composition for use in the production of electrotypes (see Group XVI), has incorporated in it an electrically-conductive filler, and also incorporated may be a p plasticizer, stabilizer, accelerator and lubricant. The thermoplastic material may be polyvinyl chloride, a copolymer of vinyl chloride and vinyl acetate, polyvinyl acetal, cellulose acetate, or natural or synthetic rubber. The filler may be graphite, carbon black, or a metallic powder. The composition may comprise 80 parts of a copolymer of 85 per cent vinyl chloride and 15 per cent vinyl acetate, mixed with 70 parts of graphite, 1.5 parts of lead stearate as lubricant, and 0.5 parts of white lead as stabilizer. Alternatively, it may comprise 82 parts of polyvinyl chloride, 110 parts of carbon black, 2.5 parts of lead stearate, 2.5 parts of white lead, and 30 parts of tricresyl phosphate as plasticizer, or 100 parts of the substance sold under the Registered Trade Mark "Hycar, OR15," a copolymer of butadiene and acrylonitrile having about 25 per cent acrylonitrile, 220 parts of carbon black, 1.0 part of stearin as lubricant, and 1.25 parts of sulphur and 1.25 parts of benzothiazyl disulphide as accelerators.
GB2775148A 1948-10-25 1948-10-25 Improvements in or relating to the production of electro-types Expired GB653367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2775148A GB653367A (en) 1948-10-25 1948-10-25 Improvements in or relating to the production of electro-types

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2775148A GB653367A (en) 1948-10-25 1948-10-25 Improvements in or relating to the production of electro-types

Publications (1)

Publication Number Publication Date
GB653367A true GB653367A (en) 1951-05-16

Family

ID=10264683

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2775148A Expired GB653367A (en) 1948-10-25 1948-10-25 Improvements in or relating to the production of electro-types

Country Status (1)

Country Link
GB (1) GB653367A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441486A (en) * 1964-06-11 1969-04-29 Intern Printers Ltd Process for producing printing plates
US3535211A (en) * 1966-12-06 1970-10-20 Ici Ltd Method for the production of embossing surfaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441486A (en) * 1964-06-11 1969-04-29 Intern Printers Ltd Process for producing printing plates
US3535211A (en) * 1966-12-06 1970-10-20 Ici Ltd Method for the production of embossing surfaces

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