DE627646C - Process for the production of graphite clay leads - Google Patents

Process for the production of graphite clay leads

Info

Publication number
DE627646C
DE627646C DE1930627646D DE627646DD DE627646C DE 627646 C DE627646 C DE 627646C DE 1930627646 D DE1930627646 D DE 1930627646D DE 627646D D DE627646D D DE 627646DD DE 627646 C DE627646 C DE 627646C
Authority
DE
Germany
Prior art keywords
production
graphite
mine
clay
graphite clay
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
DE1930627646D
Other languages
German (de)
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.)
I S STAEDTLER BLEISTIFTFABRIK
Original Assignee
I S STAEDTLER BLEISTIFTFABRIK
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 I S STAEDTLER BLEISTIFTFABRIK filed Critical I S STAEDTLER BLEISTIFTFABRIK
Application granted granted Critical
Publication of DE627646C publication Critical patent/DE627646C/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

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)

Description

Verfahren zur Herstellung von Graphit-Ton-Minen Die Erfindung betrifft die Herstellung von Graphit-,Ton-Minen, welche dazu dienen, beim Anfertigen von Zeichnungen, Schriftstücken u. dgl. auf Pauspapier Abstriche zu erzeugen, die unmittelbar durch Liehtpaus;en vervielfältigt werden können.Process for making graphite clay leads The invention relates to the production of graphite, clay mines, which are used in the manufacture of Drawings, documents and the like on tracing paper to produce smears that are immediately can be reproduced by means of tracing.

Gemäß der Erfindung wird der Fettmasse, welche in bekannter Weise zum Präparieren der gebrannten Mine dient, ein fettlöslicher Farbkörper zugesetzt zu dem Zweck, die Lichtdichte der Mine und damit die Schwarzwirkung ihrer -Abstriche zu erhöhen.According to the invention, the fat mass is obtained in a known manner serves to prepare the fired mine, a fat-soluble pigment is added for the purpose of the light density of the mine and thus the black effect of its smears to increase.

Es wurde bereits vorgeschlagen, der zur Herstellung von Bleistiftminen dienenden Rohmasse stark im Ultraviolett absorbierende Stoffe mit Ausnahme von Farbstoffen beizumengen. Dieser Vorschlag ist aber schon deshalb nicht brauchbar, weil die praktisch in Betracht kommenden Stoffe, wenn sie der rohen Minenmasse beigemengt sind, durch, das Brennen der Graphit-Ton-Mine zerstört werden.It has already been proposed that for the manufacture of pencil leads serving raw material strongly in the ultraviolet absorbing substances with the exception of dyes to add. However, this suggestion cannot be used because it is practical eligible substances, if they are added to the raw mine mass, by, the burning of the graphite clay mine will be destroyed.

Bei der Ausführung der .Erfindung können als Zusatz zu der Fettmasse, mit welcher die fertige Bleistiftmine präpariert wird, Farbkörper verwendet werden, die ,ähnlich beschaffen :sind wie die zum Präparieren von Kohlepapier gebräuchlichen. Besonders geeignet -sind die sehr lichtdichten Sudanfarbstoffe der I. G. Farbenindustrie A. G. Man wählt vorzugsweisse einen Farbkörper mit möglichst hohem Lichtabsorptionsvermögen, damit der Gehalt der Mine an Fettmasse tunlichst wenig vermindert wird und die sonstigen Eigenschaften der Mine nicht beeinträchtigt werden.When carrying out the invention, as an addition to the fat mass, with which the finished pencil lead is prepared, color bodies are used, which, similar in nature: are like those commonly used for preparing carbon paper. The very light-tight Sudan dyes from the I. G. color industry are particularly suitable A. G. One preferably chooses a color body with the highest possible light absorption capacity, so that the content of the mine in fat mass is reduced as little as possible and the others Properties of the mine are not affected.

Beispiel Eine HB-Mine enthält, 4.a% Graphit, 400/0 Ton und i 8 % Fettmasse. Gemäß der Erfindung werden 3 bis 5% der Fettmasse durch Sudangelb oder Sudanviolett ersetzt. Dieser geringe Farbkösrperzusatz ermöglicht bereits, die Lichtdichte der Mine 'so zu steigern, daß sie Minenabstriche von hoher Schwarzwirkung liefert.Example An HB lead contains 4.a% graphite, 400/0 clay and i 8% fat mass. According to the invention, 3 to 5% of the fat mass becomes Sudan yellow or Sudan violet replaced. This low addition of color bodies already enables the light density of the Mine 'to increase so that it delivers mine smears with a high black effect.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Graphit-:Ton-Minen, die zum Anfertigen lichtpausfähiger .Abstriche auf Pauspapier dienen; dadurch gekennzeichnet, daß der in bekannter Weise zum Präparieren der gebrannten Graphit-Ton-Mine dienenden Fettmasse ein fettlöslicher Farbkörpser zugesetzt wird.PATENT CLAIM: Process for the production of graphite: clay mines, which are used to make light-tracing smears on tracing paper; characterized, that the serving in a known manner for preparing the burnt graphite-clay lead A fat-soluble pigment is added to the fat mass.
DE1930627646D 1930-12-09 1930-12-09 Process for the production of graphite clay leads Expired DE627646C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE627646T 1930-12-09

Publications (1)

Publication Number Publication Date
DE627646C true DE627646C (en) 1936-03-20

Family

ID=6578435

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930627646D Expired DE627646C (en) 1930-12-09 1930-12-09 Process for the production of graphite clay leads

Country Status (1)

Country Link
DE (1) DE627646C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746988C (en) * 1939-08-18 1945-01-09 Dr Raimund Berger Process for the manufacture of fired writing bodies, e.g. pencil leads, pens or chalks
DE764030C (en) * 1936-07-18 1954-01-25 Staedtler Fa J S Process for the production of burnt graphite clay leads

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764030C (en) * 1936-07-18 1954-01-25 Staedtler Fa J S Process for the production of burnt graphite clay leads
DE746988C (en) * 1939-08-18 1945-01-09 Dr Raimund Berger Process for the manufacture of fired writing bodies, e.g. pencil leads, pens or chalks

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