This homogenized, opaque white watercolor comes in a dip-friendly 1 oz. jar and is formulated to stay white when applied over dyes or designer's colors.
 
Straight from the jar, it functions as an artist's workhorse white-out. Add about 1/4 tsp. of water (directly to the jar), gently stir just the top centimeter of fluid, and you've got yourself a dip pen ink that stays just as crisp on thick cardstock as it is on glossy magazine paper!

Jac