Micro-pulverized pigments are suspended in a professional quality shellac solution. This warm black drawing ink is inter-mixable with other Higgins Inks to create custom colors. Can be diluted with distilled water. Non-waterproof ink will blend and create gradients better than traditional waterproof or water-resistant black inks. 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