Maestriaa Wiro Pad is made from 100% cotton rag, is acid free and buffered with adequate calcium reserve to protect it from atmospheric acid migration in to the paper. It is supported at the back by a 2mm Kappa board which enables the artist to work effortlessly and comfortably. Application: Watercolour, Wash, Wet & Wet, acrylic (before applying acrylic, please coat with texture white), Mixed-media. Our Hot Press paper can also be used for Pen & Ink, Pencil & Charcoal, Markers, Calligraphy and Mixed-media.