Valve-action Structure: SHAKE WELL BEFORE EVERY USE; Great control of ink and gas, high-technology | Multi-Colors: 12 vibrant colors: Black, White, Brown, Red, Orange, Yellow, Green, Blue, Violet, Pink, Gold, Silver | Ink Properties: Water and Fade resistant, Opaque ink, the bright color is durable in high temperature, Artwork permanent saving after oven baking | Smooth Writing: Writes on nearly any surface with your imagination and creation. Expert on ceramic, porcelain & china. It’s also suitable for wood, rubber, glass, metal, stone, plastic and so on. | Ink Certificated: Conforms to ASTM D-4236 certificate, non-toxic and acid free. But don't swallow it and No food contact