Residence Blue fountain pen ink made by P.W. Akkerman pen store in The Hague.
Residence Blue is a light shade of powder blue that is reminiscent of a slightly cloudy sky. This ink is a consistent color that doesn't seem to do much in the way of shading but is still a beautiful, pastel like color.
Originally made to celebrate their 100th anniversary, this ink comes in a vintage-style 60mL glass bottle with a narrow neck and a marble stopper that creates a well at the top to aid in filling pens, allowing you to get every last drop of ink from the bottle.