50ml Signature Inks

Celebrate Robert Oster's 7th Anniversary with their exciting new range of inks! This milestone marks a significant moment for the brand, and they a...

Robert Oster Graphite is a dark grey fountain pen ink with a slight green undertone and medium shading. It dries in 30 seconds in a medium nib on R...

Robert Oster Charcoal is a dark grey fountain pen ink with a strong purple undertone and low shading. It dries in 15 seconds in a medium nib on Rho...

Robert Oster Australian Opal Grey is a pale grey fountain pen ink with a slight purple undertone, medium shading, and a pop of copper sheen in larg...