ZIG Fabricolor Twin markers are designed for fabrics like cotton, linen, polyester, but also suitable on paper and wood. Water-based pigment, semi-opaque and acid-free. Two different size tips: a 1 mm tip for detailing and outlining and a flexible brush tip for more complete coverage. Permanent on fabrics after ironing. Ink Type: Non-Opaque, Acid-Free, Lightfast, Odourless, Xylene Free. MADE IN JAPAN.