Small batch, handcrafted natural inks by Georgia McGovern. Black Walnut Ink: Black walnuts foraged in Vermont. Color is a golden-brown. Instructions and caring for inks: The inks are intended as a drawing and painting medium and should be used with nibs, bamboo pens, and brushes. They are not made for fountain pen ink cartridges. If you are using nibs or pens, clean them after use as the ink can dry and clog them. The inks are water-soluble and do not need diluting. The inks should be stable and have a long shelf-life but are derived from natural organic materials, so some fading and changes may occur to the ink over time. If any molding occurs, it can be removed and you can continue to use the ink.