50ml Signature Inks

The Robert Oster Signature Ink Muddy Crown colour is a dusty dark purple ink color infused with a brown tint and slight sheen.

Robert Oster Copper is a muted purple-red fountain pen ink with medium shading and black sheen in large swabs. It dries in 30 seconds in a medium n...

Robert Oster Blue Black is a dark blue black fountain pen ink with a purple undertone, low shading, and low copper sheen. It dries in 20 seconds in...

Ten Dollar Blue by Robert Oster Let your jottings become creative expressions with this impressive Signature fountain pen ink. Robert Oster Signatu...

Robert Oster Pink Squirrel is a part of the Robert Oster Signature Inks Line and is handmade in Australia. This pink/purple/plum colour is muted bu...

Robert Oster Hot Pink is a medium magenta pink fountain pen ink with medium shading. It dries in 20 seconds in a medium nib on Rhodia and has an av...

Robert Oster Australian Sky Blue is a bright turquoise blue fountain pen ink with medium shading and low pink sheen. It dries in 30 seconds in a me...

Robert Oster African Gold is a pretty, golden-yellow fountain pen ink with medium shading. It dries in 30 seconds in a medium nib on Rhodia and has...

Robert Oster Velvet Crush is a medium warm purple fountain pen ink with medium shading and medium gold sheen. It dries in 15 seconds in a medium ni...

Robert Oster Smokescreen is a dark purplish brown fountain pen ink with medium shading. It dries in 20 seconds in a medium nib on Rhodia and has an...

Robert Oster Marine is a medium teal-green fountain pen ink with medium shading and medium pink sheen. It dries in 20 seconds in a medium nib on Rh...

Robert Oster Jade is a medium earthy green fountain pen ink with medium shading. It dries in 40 seconds in a medium nib on Rhodia and has an averag...

Robert Oster Chocolate is a dark red-brown fountain pen ink with medium shading. It dries in 20 seconds in a medium nib on Rhodia and has an averag...

Robert Oster Blue Night is a pretty, deep blue with medium shading and medium pink sheen. It dries in 40 seconds in a medium nib on Rhodia and has ...

Robert Oster Aqua is a beautiful blue-teal fountain pen ink with high shading and medium pink sheen. It dries in 30 seconds in a medium nib on Rhod...

Robert Oster Sinner’s Blood is a dark red fountain pen ink and comes in a bottle of 50ml. Robert Oster Inks  An iconic Aussie product within just...

Robert Oster Turquoise is a medium blue green fountain pen ink with medium shading and medium pink sheen. It dries in 20 seconds in a medium nib on...

Robert Oster True Blue is a dark blue fountain pen ink with medium shading and medium pink sheen. It dries in 15 seconds in a medium nib on Rhodia ...

Robert Oster School Blue is a dark blue fountain pen ink with medium shading and medium pink sheen. It dries in 20 seconds in a medium nib on Rhodi...

Robert Oster Pinky is a light pink fountain pen ink with medium shading. It dries in 25 seconds in a medium nib on Rhodia and has an average flow. ...

Robert Oster Ng Special 16 is a medium yellow-orange fountain pen ink with medium shading. This ink color was custom created for a customer, then r...

Robert Oster Golden Brown is a dark brown fountain pen ink with a slight red undertone and low shading. It dries in 30 seconds in a medium nib on R...

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...

Robert Oster Muddy Sand from the Mudpack collection is a medium sandy brown ink in a medium shade.