Kyler Griggs
added comment inUltimate Guide to Pencils and Erasers
1yr
The graphite degree system was invented by Franz Hardtmuth. When naming the grades, he chose H for Hardtmuth, F for Franz, and B for Budějovice, the city in which the pencil factory is located.
So while the F pencil may seem like an outlier, its name isn't completely arbitrary.
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