JPH0551031B2 - - Google Patents

Info

Publication number
JPH0551031B2
JPH0551031B2 JP9348385A JP9348385A JPH0551031B2 JP H0551031 B2 JPH0551031 B2 JP H0551031B2 JP 9348385 A JP9348385 A JP 9348385A JP 9348385 A JP9348385 A JP 9348385A JP H0551031 B2 JPH0551031 B2 JP H0551031B2
Authority
JP
Japan
Prior art keywords
black
pencil lead
sintered
atmosphere
iron
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 - Lifetime
Application number
JP9348385A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61252278A (ja
Inventor
Shin Shimoyama
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.)
Pentel Co Ltd
Original Assignee
Pentel Co 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 Pentel Co Ltd filed Critical Pentel Co Ltd
Priority to JP9348385A priority Critical patent/JPS61252278A/ja
Publication of JPS61252278A publication Critical patent/JPS61252278A/ja
Publication of JPH0551031B2 publication Critical patent/JPH0551031B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Inks, Pencil-Leads, Or Crayons (AREA)
JP9348385A 1985-04-30 1985-04-30 鉛筆芯の製造方法 Granted JPS61252278A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9348385A JPS61252278A (ja) 1985-04-30 1985-04-30 鉛筆芯の製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9348385A JPS61252278A (ja) 1985-04-30 1985-04-30 鉛筆芯の製造方法

Publications (2)

Publication Number Publication Date
JPS61252278A JPS61252278A (ja) 1986-11-10
JPH0551031B2 true JPH0551031B2 (enrdf_load_stackoverflow) 1993-07-30

Family

ID=14083592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9348385A Granted JPS61252278A (ja) 1985-04-30 1985-04-30 鉛筆芯の製造方法

Country Status (1)

Country Link
JP (1) JPS61252278A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7217378B2 (en) 2003-09-10 2007-05-15 Council Of Scientific & Industrial Research Simple and efficient process for the preparation of pencil lead from spent pot-liners

Also Published As

Publication number Publication date
JPS61252278A (ja) 1986-11-10

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