Overview Reviews Product Description These watercolour inks have been specially formulated for writing and drawing. For use with fountain pen and rollerball pens. Tin of 6 cartridges. Dark Grey. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Herbin Herbin Writing Ink Cartridge Vert de Gris, Pack of 6 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments