Category
Pencils & Leads
Understanding Pencil Lead Grades: The HB Scale Explained
The HB scale decoded: what the H, B, and F letters mean, how US pencil numbers like #2 map to HB, and which grades suit writing, drafting, or sketching.
Mechanical Pencil Lead Diameters: A Complete Guide
A complete guide to mechanical pencil lead diameters from 0.3mm to 2.0mm: which size to choose, why thin leads snap, and how diameter and grade are separate choices.