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Definition of 6H
1. Initialism. (British) A grade of pencil with lead that makes lighter marks than a pencil grade 5H; a pencil with extremely hard lead. ¹
¹ Source: wiktionary.com
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1. Initialism. (British) A grade of pencil with lead that makes lighter marks than a pencil grade 5H; a pencil with extremely hard lead. ¹
¹ Source: wiktionary.com