The Uni POSCA PC-5M is a versatile water-based pigment ink marker that writes smoothly on a wide range of surfaces without bleeding through paper. Its polyester bullet-shaped nib creates a medium line of approximately 2.5mm. This marker is now available in 39 vibrant colors, including a distinct orangey yellow. POSCA markers are known for their opaque ink and work on most surfaces. They are permanent on absorbent materials like paper and card. For shiny surfaces, the ink can be removed with a scraper. To ensure permanence on various materials, follow these instructions: Paper/Card: No additional action needed as the ink is absorbed into the fibers. Terracotta: Bake in an oven at 220°C for 45 minutes, then apply a clear varnish spray. Textiles: Iron the fabric on the reverse side. Porcelain: Bake in an oven at 160°C for 45 minutes, with the option to spray with clear varnish. Metal, Glass, and Wood: Apply a clear varnish spray. Plastic: Apply a clear varnish spray. Please note that markers may arrive either wrapped or unwrapped during a transition period.