Posca writes on virtually any surface; metal, wood, canvas, plastic, fabric, etc, and will not 'bleed through' paper. POSCA markers use water-based pigment ink to produce poster-paint-like vibrant colours. A favourite of both children and adults to colour with accuracy. Posca's extra-fine tip is ideal to transform objects, to make drawings and colourings, for professionals to colour documents, to make rough sketches or mark with accuracy, for creative crafts hobbyists and of course for artists.