The Finest British Made Fountain Pen Ink Suitable for All Pens   Named for the deepest point of the ocean - the Marianas trench - this deep blue ink reflects the ocean’s mystical depths. Transform the way you create with an ink colour that sets you apart! Most pens offer ink cartridges in a limited selection of colours! I want to change that by bringing you this range of beautifully rich and distinctive inks - with no need to dispose of, or replace an empty cartridge. These wonderfully free-flowing inks come in a number of beautiful and nuanced shades. They truly are a joy to write or create with!    GOOD TO KNOW * For use in Fountain Pens, The Lumos and all dip pens.