RANGER-Studio Line Extra Time. Expand your painting and color blending capabilities with Claudine Hellmuth Studio Extra Time! This medium slows down the drying time of Studio Acrylic Paints. Ideal for stamping; printmaking; brayering; faux finishing and more. Mix equal parts Extra Time and Studio Paint to extend working time by 20-30 minutes. This water-based; acid free; non-toxic medium is easily cleaned up with soap and water. This package contains one 4oz/118ml jar of medium. Made in USA.