hardness pencil

hardness pencil, Total:2 items.

The international standard classification for "hardness pencil" includes: .

The Chinese standard classification for "hardness pencil" includes: Basic standard and general method for coating .

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

• GB/T 6739-1996 Determination of film hardness by pencil test

Professional Standard - Agriculture

• GB/T 6739-1986 Coating film hardness pencil test method

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