Mechanical pencils -- Part 2: Black leads -- Classification and dimensions

Document Number: ISO 9177-2:1989
File Size: 186 kB
Language: English
Provider: ANSI
Shipping: Available for download - Link will be provided in My ComplianceOnline section

Price: $37.00
Product Details

Two types are available, black leads in which the binding agent is an organic polymer (designated by the letter 'P'), and black leads in which the binding agent is clay (designated by the letter 'C'). Classification is made according to the degree of hardness. Part 1 deals with the classification, dimensions, performance requirements and testing.

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