Diamine Oxford Blue Ink Cartridges (Set of 18) 15ml One of those inks you

One of those inks you would mistake for black at first

Cobalt Jazz Bottled Ink by Diamine is non-toxic water-based with gold shimmer fountain pen ink that can be used with any fountain pen and will not clog your pen

with a cup of tea

Kid Finish®

Diamine Oxford Blue Ink Cartridges (Set of 18) 15ml One of those inks youOxford Blue Bottled Ink by Diamine is non toxic water based fountain pen ink that can be used with any fountain pen and will not clog your pen. A secret ingredient has been added by Diamine producing smooth flowing, vibrant colors that glide across your paper surface. Available in over 200 variations, you are sure to find the perfect color for your writing needs! Volume: Ink Cartridges (18 ea) Short International Color Family: Blue