Create your watercolor resist works of art with this Ink Masking Fluid Write by Brea Reese. Use the masking fluid on a blank paper or canvas. Once dry, you can paint on top and watch as the watercolors reveal your design made with the fluid writer. Made to be used with watercolors or alcohol inks. The Fluid Writer comes packaged inside a squeezable pen. The pen holds 1.02 fluid ounces.