Truce Turquoise fountain pen ink made by P.W. Akkerman pen store in The Hague.

A rich true blue turquoise with very nice shading properties. A staff favorite at Vanness.

Originally made to celebrate their 100th anniversary, this ink comes in a vintage-style bottle with a narrow neck with a marble stopper, to create a well at the top to aid in filling pens.

Ackerman