ISO-9177-3 › Historical Revision Information
Part 3: Black Leads - Bending Strengths of Hb Leads, Mechanical Pencils -

ISO-9177-3 - 1ST EDITION - SUPERSEDED
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Specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.

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Document Number

ISO 9177-3:1994

Revision Level

1ST EDITION

Status

Superseded

Publication Date

July 1, 1994

Committee Number

ISO TC 10/SC 9/WG 4