Micro-pulverized pigments are suspended in a professional quality shellac solution to create this waterproof, lightfast ink. This traditional black drawing ink is a deep charcoal shade and 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. Close cap tightly after use. 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. Shake well before use. Made in the USA