Koh-I-Noor Hardtmuth: The 1790 Factory Behind the HB Scale and the Yellow Pencil
Why is the pencil in your hand painted yellow? And what do the H and B in HB actually stand […]
HB pencil
What HB means, how it compares to 2B and 2H, and how to specify pencil grades for your order — from a bamboo pencil factory that makes all three.