Need to "dull" down the color of the Angelus Leather Paint? Then the Angelus Duller is for you! Instead of adding water use this product as your mixing meduim. The standard mixing ratio is 1 1/2ml of duller to a 1 ounce bottle of paint. The mixing ratio of the duller can be customized to the artisan's specific requirements. Well respected shoe painters recommend as much as 4.5 ml of duller per 1 ounce of paint. By making this product available separately, and not incorporating it directly into the Angelus Leather Paint, every artist can create a unique custom look.