Diamine Gibson Fountain Pen Ink Sample (3mL)Diamine Gibson Les Paul Guitar Ink. Inspired by the favoured instruments of the likes of Slash, Jimmy Page, Billy Gibbons and Bob Marley. Four out of the five available are shades of brown from a deep red through to dark gold but as that's the usual colour for a Les Paul, this is hardly surprising! The fifth is a deep, rich blue. 3mL ink samples contained in a plastic vial with an o ring to ensure a proper seal.