Holbein Acrylic Ink provides you with the same pigment strength and color intensity as found in other Holbein products, but with much lower viscosity. The inks do not shift in color tone from wet to dried color and can be used with a variety of tools to distribute the ink. It will not clog a .01mm, making it compatible with any airbrush, technical pen, or refillable marker. Holbein Acrylic Inks can be used directly for bold, brilliant color or can also be used to achieve the subtle characteristics, washes and tones of watercolor painting. These acrylic inks are fully compatible with all Holbein water soluble media