This opaque white drawing ink with micro-pulverized pigment in professional quality shellac solution is inter-mixable with other Higgins inks to create custom colors. Can be diluted with distilled water. Compatible with dip pens, brushes, and airbrushes, with good adhesion to most surfaces. Do not mix with acids or use as tattoo ink. Not launderproof. Clean tools with tap water immediately after use or use Higgins Pen Cleaner for dried ink.