Description Diamine Red Edition Night Shade fountain pen ink is a medium shade of blue that leans towards purple. The very unique 50ml glass bottle has concave sides and stands on 4 legs. This color was released as part of the 2021 Inkvent Calendar, and is now part of the regular Red Edition lineup. Diamine fountain pen ink is considered to be well behaved and smooth flowing, and has been made in the UK for over 150 years. Having trouble deciding between colors? Use our Ink Comparison Tool to quickly and easily view different colors side by side. We offer Free Shipping on all orders over $59 for US customers, and for orders over $250 for our Canadian customers.