The OTR laboratory developed a marker which really is a flowpen.
With some exercise you really let the ink “flow” through the tip, creating drips.

The OTR Calligraffiti marker was introduced as a limited special edition marker in 2010, to mark the release of Niels 'Shoe' Meulman's 'Calligraffiti' book (From Here To Fame Publishing).
It's now a permanent fixture of OTR's extensive bombing marker inventory


Specialised 20mm bevelled T-tip, with 3 distinct edges that can be used to create 3 different line widths

Designed for perfecting intricate hand-style effects

Flow control pump system

Permanent spirit based ink

For indoor/outdoor applications