Dr. Ph Martin's Hydrus Water Colour - Ultramarine Red Violet

Dr. Ph Martin’s Hydrus watercolours are lightfast, transparent, non-toxic, quality colours in 1oz glass dropper bottles. The product formula delivers the same permanence and brilliance as traditional tube watercolours. Hydrus watercolours can be blended and intermixed while maintaining the luminosity and transparency of the colours. They are great for calligraphy dip pens, technical pens, and airbrush.