Using water-based media with china paints has many benefits, including easy brush clean-up with water, fewer fumes during the firing and the ability to add water to the paint mixture if needed. For more information on painting with the 'Waterbase Technique', order the Worksheet (G123) from the Doll Artisan Guild at www.dollartisanguild.org. Ultra Fine Line Medium is an odorless medium for for eyelashes and eybrows. Super smooth formula helps you paint delicate lines. No clumping or blotching. Tinted purple for easier identification. Packaged in a plastic squeeze bottle containing 1 fluid ounce (30 ml) of painting medium.