Talens Ecoline Brush Pen Set of 10 is based on dyes and Gum arabic. The colours of Talens Ecoline are astonishingly bright and brilliant. If you wish, you can easily decrease the colour intensity through thinning with water or with the Brush Pen blender (separately available). Store the original works of art in a portfolio for optimal colour retention. The concentrated formula of the Talens Ecoline in the Brush Pens ensures for a seamless transition with the Talens Ecoline from the bottles. Using the special Brush Pen blender, colours can be mixed or subdued, and some wonderful wash effects and colour transitions can be created. Contents: 10 Brush Pens (205 Lemon yellow (Primary) -227 yellow ochre-237 deep orange-334 scarlet-337 magenta-548 blue violet-505 ultramarine deep-578 sky blue (cyan)-600 green-700 black) Forgotten to put the cap back on? A dried brush tip can be easily saved by moistering it with some water.