GB675321A - An improved method of producing unburned pencils - Google Patents

An improved method of producing unburned pencils

Info

Publication number
GB675321A
GB675321A GB2341/50A GB234150A GB675321A GB 675321 A GB675321 A GB 675321A GB 2341/50 A GB2341/50 A GB 2341/50A GB 234150 A GB234150 A GB 234150A GB 675321 A GB675321 A GB 675321A
Authority
GB
United Kingdom
Prior art keywords
parts
colloidal
lampblack
talcum
glycerine
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
GB2341/50A
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.)
GEORG WISSMUELLER
RUDOLF KREUTZER
Original Assignee
GEORG WISSMUELLER
RUDOLF KREUTZER
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 GEORG WISSMUELLER, RUDOLF KREUTZER filed Critical GEORG WISSMUELLER
Publication of GB675321A publication Critical patent/GB675321A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D13/00—Pencil-leads; Crayon compositions; Chalk compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/16—Making non-propelling pencils
    • B43K19/18—Making pencil writing-cores

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

675,321. Pencil leads. KREUTZER, R., and WiSSMULLER, G. W., (trading as STAEDTLER MARS-BLEISTIFTFABRIK, J. S.). Jan. 30, 1950 [Oct. 14, 1949], No. 2341/50. Class 146 (iii). An unburned pencil lead for indelible writing and comprising writing material, filling material, smoothing material and binding material, has colloidal lampblack as the writing material to which is added a wetting agent or agents. The wetting agents cause the lead to penetrate the paper by absorption. In addition to the lampblack, colloidal graphite may be included in the writing material. The lead mass may have mixed therein a copying dyestuff, e.g, methylene blue or Sudan dye, in the case of leads intended for copying. For the wetting agents, use may be made of materials, the polar groups of which will lower the surface tension at the point of contact between the lampblack and the paper, e.g. hydroxyl, carboxyl and sulpho groups. Certain hydrocarbon compounds such as glycerine, emulphor and that known under the Registered Trade Mark " Vaseline " are also suitable. The following examples of compositions are given.- (1) Colloidal lampblack (15 parts), colloidal graphite (15 parts), talcum (30 parts), calcium stearate (20 parts), glycerine (10 parts), emulphor (5 parts) and gum tragacanth (20 parts). (2) Colloidal lampblack (15 parts), colloidal graphite (15 parts), talcum (20 parts), calcium stearate (40 parts), glycerine (15 parts), benzol cellulose (40 parts), and vinyl acetate (55 parts). (3) Colloidal lampblack (15 parts), colloidal graphite (15 parts), talcum (35 parts), calcium stearate (35 parts), " Vaseline " (15 parts) and gum tragacanth (20 parts).
GB2341/50A 1949-10-14 1950-01-30 An improved method of producing unburned pencils Expired GB675321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE675321X 1949-10-14

Publications (1)

Publication Number Publication Date
GB675321A true GB675321A (en) 1952-07-09

Family

ID=6593248

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2341/50A Expired GB675321A (en) 1949-10-14 1950-01-30 An improved method of producing unburned pencils

Country Status (1)

Country Link
GB (1) GB675321A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852397A (en) * 1953-12-21 1958-09-16 Gerald A Goessling Non-solid erasable writing medium and instrument utilizing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852397A (en) * 1953-12-21 1958-09-16 Gerald A Goessling Non-solid erasable writing medium and instrument utilizing same

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