Uni POSCA PC-17K water-based pigment ink marker. Writes on virtually any surface with no bleed through on paper. Acrylic chisel-shaped nib writes a 15mm line. Black, White, Red, Yellow, Green, Blue, Light Blue, Pink. POSCA works on most surfaces and is permanent on absorbent media such as paper and card, and can be removed from shiny surfaces with a scraper. To make permanent:Paper/Card: No action needed - POSCA pigment will be absorbed into the fibres, making it permanent. Terracotta: Bake in the oven at 220°C for 45 minutes, then spray with clear varnish. Textiles: Iron on the reverse side. Porcelain: Bake in oven at 160°C for 45 minutes, optionally spray with clear varnish. Metal: Spray with clear varnish. Glass: Bake in oven at 160°C for 45 minutes, then spray with clear varnish. Wood: Spray with clear varnish. Plastic: Spray with clear varnish.