If you are varnishing acrylic colours

The ink consists of soot pigment and shellac

9 mm HB leads and is of course refillable

opaque lacquer paint

the pens are easy to carry and you can easily hold many in your pencil case

pentel pocket brush pen refill cartridges 4 pack Ink and paint refills If you are varnishing acrylicThese refills are made for the Pentel Pocket Brush Pen (GFKP) and come with a smooth flowing, pigment based ink thats both waterproof and fade resistant. Perfect if you want your lines to stay crisp and bold over time. The pack includes four cartridges, so youll have plenty of ink to keep your brush pen ready for all your lettering, sketching, or illustration projects.