Method for the production of pencil leads and pencil leads...

Details Method for the production of pencil leads and pencil leads... Method for the production of pencil leads and pencil leads...

C - Chemistry, Metallurgy

09

D

6/22

C09D 13/00 (2006.01)

Patent

CA 1300816

01386-221 ABSTRACT OF THE DISCLOSURE METHOD FOR THE PRODUCTION OF PENCIL LEADS AND PENCIL LEADS PRODUCED BY THE METHOD The invention is concerned with the production of pencil leads and also pencil leads as produced by the proposed method. In accordance with the invention graphite, enamel frit and quartz flour, preferably at least approximately in a ratio of one part of graphite, two to four parts of enamel frit and one part of quartz flour are processed to form a starting mixture, which is then pressed into the form of a lead, is dried and is fired. The invention renders it possible to perform sintering below a temperature of 550°C and accordingly to perform the sintering firing operation in a normal oxidizing atmosphere.

551075

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