Yupo is a type of synthetic paper that can be used for a variety of media including acrylic and watercolour paint, alcohol inks. The paper has a smooth, white surface that is suitable for a variety of techniques, including blending and merging of colours, and subtractive methods. When your media is still wet, the surface of the paper can be wiped to reveal the white surface of the paper, and when your media is dry it can be gently scratched to reveal the white surface below.