Dating back to a small boutique in Paris in 1700 Herbin Fountain Pen Ink is one of the best in the world, both in smoothness of writing and breadth and brilliance of colour palette. Bleu Pervenche is a distinct light blue ink that retains a degree of softness while nevertheless remaining quite bright. Tending from the bright azure of a summer sky to the shallows of a tropical beach, with suggestions of green, it appears slightly darker on ivory than on white and is invariably refreshing. All Herbin inks are pH neutral and non-toxic. They are water-based and therefore will run if wetted. The inks are light fast and only natural dyes are used. We recommend high quality paper with Herbin Ink.