Craft Design Technology Brush Sign Pen 10 Colours Set

Pentel introduced the Sign Pen in 1963 — the first pen to pair a felt tip with water-based ink — and it went on to fly on two NASA missions in 1966, tucked into an astronaut's suit pocket. Craft Design Technology's version keeps Pentel's original tip and ink, wrapped in CDT's own barrel colour, Byakuroku, a pale whitish-green named for a traditional Japanese pigment.

This set gets you all ten ink colours in one box — every shade CDT makes for this pen, from the everyday black and red through to softer, less common tones. Each pen has the same flexible fibre tip and smooth water-based ink as the individual pens, which are also sold on their own or in a 5-colour set.