The label artwork depicts the Northern Lights in all their colorful glory because the ink absorbs their full spectrum. This is a conventional black ink from the 1950s super smooth writing shades well and perfect for artists and calligraphers with fast flex pen work to do. It is water resistant on most paper grades - HOWEVER unlike other grades of Noodler's Black (Standard Black Polar Black Heart of Darkness and X-Feather) Borealis is NOT a bulletproof black. What does that mean? This ink CAN be removed by several laundry detergents and carpet cleaners. It vanishes before bleaches. It is not considered fraud resistant (though still far safer than most ball point pens!). It is not resistant to heavy UV light exposure. It is simply a super smooth writing conventional black ink that still has the value added content of the 1950s which have been lost in many modern conventional inks.

Borealis is PH neutral and contains 3 ounces of ink per bottle.