This medium slows drying; thins color; improves blending and transparency. It dries clear and glossy and can be mixed with any acrylic color. Use for enhanced color blending. An essential medium for creating softer edges and modeled forms. This medium is used to extend the open time of acrylics by more than 40%, giving you an opportunity to really work the paint to enhance color blending. Add up to 50% of this medium as it contains binder to retain the integrity of the paint film, unlike additive versions.