Perle Noire: l'encre noire a été la première inventée par Herbin, d'une qualité exceptionnelle, il lui donna le nom de "perle des encres" pour faire référence à son côté précieux.
Perle noire (Black Pearl): the black ink was the first created by Herbin, with an exceptional quality. He gave it the name “Perle Noire” for its preciousness.
30 ml "D" Bottled Fountain Pen Ink
Each 30 ml bottle has an integrated pen rest. They are known as "D" bottle pen inks. The "D" refers to the old French unit of measure "la Demi Courtine".