How to maintain and get the most longevity out of your Bleed Proof White! . Dr. Ph. Martin’s® BleedProof White is an opaque watercolor for covering dye colors, markers, and designer colors. It is not intended for mixing. Comes in a 1.0 oz (30 ml) glass jar. . Made in small batches, by hand, in the USA. . Most common uses is calligraphy, fixing painting mistakes and cover ups, achieving the “whitest of white”. . . #drphmartins #bleedproofwhite #bombayink #watercolor