Talens Ecoline Brush Pen Set of 30 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. 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: 30 Brush Pens (201 light yellow - 202 deep yellow - 205 Lemon yellow (Primary) - 227 yellow ochre - 233 chartreuse - 236 light orange - 237 deep orange - 311 vermilion - 318 carmine - 334 scarlet - 337 magenta Magenta- 407 deep ochre - 411 burnt sienna - 416 sepia - 422 reddish brown - 505 ultramarine deep - 507 ultramarine violet - 508 prussian blue - 522 turquoise blue - 545 red violet - 548 blue violet - 578 sky blue (cyan) - 600 green - 601 light green - 602 deep green - 656 forest green - 700 black - 717 cold grey - 718 warm grey - blender) Forgotten to put the cap back on? A dried brush tip can be easily saved by moistering it with some water.