Quite a few people seem to be interested in these pencils, so I’m pleased to be able to mention a superb modern example that I recently learned about – the Pentel Mark Sheet pencil.
This hexagonal pencil is finished in blue with silver lettering. Two grades exist – HB, which has an orange cap, and B, with a red cap.
The pencils are marked –
Side 1: Pentel Mark Sheet Pencil HB
Side 3: the best quality for OCR sheet marking CM10 Japan HB
Side 5: [bar code]
The lead is just superb – at the pinnacle of modern graphite quality. The pencils leave extremely dark, rich lines. There is often a crumbling issue when a pencil’s graphite saturation reaches this level, but these pencils have no such problem.
It would be hard to imagine a better performing pencil.