Specifications
Common questions
Everything people ask us about POSCA before they buy.
It is an 8mm chisel, so it lays down wide flat strokes and crisp edges — the pen for window art, signage and murals. Turned on its edge it still gives you a much finer line.
Wipe the glass with methylated spirits first so there is no grease. POSCA sits on top of glass and comes off with a damp cloth until you fix it, which is exactly what you want for window art you change each season.
Be careful — on a porous chalkboard POSCA can be permanent. If you rewrite the board every week, use uni Chalk markers instead, which are made to wipe off.
Yes. Broad tips hold more paint and take longer to charge than fine ones. Shake with the cap on until the ball rattles, then press the tip straight down on scrap paper until colour appears.
Let it dry fully, then either spray a clear acrylic varnish in several light passes from about 30cm, or — on glass and ceramic — bake the piece: into a cold oven, up to around 160°C, hold about 45 minutes, then cool it in the oven so it does not crack.






