50ml Signature Inks

This color is a smokey denim blue, almost a dark teal, that takes on a lot of different colors in its shading. It can even sheen with a bit of rose...

The "clean and clear" Australis Hydra is a beautiful steel blue, representing mythical creatures or Greek islands. But - Australia - probably jelly...

Robert Oster Torquay is a bright medium turquoise fountain pen ink with medium shading and low pink sheen. It dries in 25 seconds in a medium nib o...

Robert Oster Sinner’s Heart is a grayish-purple fountain pen ink with dark shades and comes in a bottle of 50ml. Robert Oster Inks  An iconic A...

Robert Oster Sinner’s Weed is a deep green fountain pen ink and comes in a bottle of 50ml. Robert Oster Inks  An iconic Aussie product within jus...

Robert Oster Blue Denim is a medium blue fountain pen ink with a green undertone, medium shading, and medium pink sheen. It dries in 30 seconds in ...

Robert Oster Sinner’s Poison is a yellow-greenish fountain pen ink with dark undertones and comes in a bottle of 50ml. Robert Oster Inks  An iconic...

Robert Oster - Kids On The Block This is a blue first released in UK for a school kids event organized by Bernardo Gomes of Fountain Pen UK Facebo...

Robert Oster Midnight Sapphire is a dark blue, almost a blue-black fountain pen ink with medium shading and a pop of pink sheen in large swabs. It ...

Robert Oster Frankly Blue is a medium blue fountain pen ink with a slight green undertone, medium shading, and medium sheen. It dries in 30 second...

Robert Oster Australian Opal Blue is a pale, spring blue fountain pen ink with low shading. It dries in 20 seconds in a medium nib on Rhodia and ha...

Robert Oster Australian Opal Mauve is a blue-purple fountain pen ink with low shading. It dries in 25 seconds in a medium nib on Rhodia. Robert Ost...

Robert Oster Evening Sapphire is a medium dusky blue fountain pen ink with medium shading and a pop of pink sheen in large swabs. It dries in 30 se...

Robert Oster Bass Straight from the 1980’s collection is a dusky, medium blue fountain pen ink with high shading and a pop of pink in large swabs. ...

Robert Oster Steely Days is a light blue fountain pen ink, medium shading, and medium pink sheen. It dries in 30 seconds in a medium nib on Rhodia ...

The Robert Oster Signature Ink NYC.USA takes it to the blue skies of new york city with dark blue shading!