Smooth bright white surface works clean for line work

or any flat color block that needs to cover ground without showing brush strokes

literally when the theme for the number is just getting caught for illegal graffiti

Published: 2016

or anyone running their own color system instead of buying premixed every time

pentel pocket brush pen refill cartridges 4 pack hiddenproduct Smooth bright white surface worksFour replacement ink cartridges for the Pentel Pocket Brush Pen (GFKP GPP3 series). Push engagement seal swaps cleanly mid session with no leaks. Pigment based black ink waterproof and fade resistant once dry, so watercolor washes or alcohol markers can go over your lines without bleeding or reactivating. Contents: 4x black cartridges Ink: Pigment based, waterproof, UV fade resistant Fits: Pentel Pocket Brush Pen (GFKP GPP3)