Daler-Rowney Pro Ink 1oz Black
Daler-Rowney Pro Inks are super-opaque for superior covering power, whether erasing mistakes or adding highlights and details, and can be thinned down for washes or for use in a pen or airbrush. Pro Black offers the highest covering power over watercolors, marker, pen and ink and more on paper, acetate, and photos -- and it won't yellow, crack or chip over time.
Mix Pro Black with Pro White to produce opaque, cool grays.