Ink : Opaque, waterbased, permanent* pigment (more like paint than ink though). Non toxic, lightfast, waterproof. Available in 17 colours. Nib : Polyester, bullet tip, removable and reversible. Size : Fine (approx 1.5mm) Manufacturer :  Uniball (by Mitsubishi Pencil) www.posca.com RRP : £2.63 each, although better prices online. I get mine from CultPens at £2.12 … Continue reading Pen Geek : Uni POSCA PC-3M bullet tip / fine line