Dr. Ph.martin's Hydrus W/c Ink

Dr. PH Martin's Hydrus Fine Art Watercolors are lightfast, brilliant, and concentrated. They are non-toxic, transparent, and housed in a glass bottle. This liquid product delivers the same brilliance and permanency as traditional tube watercolours. Made from the finest artist pigments, Hydrus Watercolors can be blended and intermixed while still maintaining the transparency and luminosity of the colours. As they are already in a liquid suspension, you cannot do "dry brush" techniques with them.