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. Named for a popular drink made of peppermint syrup and club soda, Diabolo Menthe is a bright, cheery turquoise blue, great for invites and other celebratory occasions. It can be a bit harsh on bright white papers and is recommended for broad nib pens to aid flow and shading, and on an ivory or darker-than-ivory paper stock. 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.