Bottle of Robert Oster Signature “True Blue” fountain-pen ink, 50ml, with gold-foil label, shown next to a deep blue color swatch with red sheen.
True Blue - 50ml ink swatch showing a vibrant cobalt-to-royal blue wash with deeper pigment veins and a reddish-purple sheen along the edges.

True Blue - 50ml

Bottled Ink

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Robert Oster Signature Ink - True Blue

Discover True Blue, a signature fountain pen ink handmade in Australia with a focus on sustainability, performance, and vibrant color expression.

  • Non-toxic formula safe for everyday fountain pen use
  • Bottled in recyclable PET made at Australia's first carbon-neutral plastics facility
  • Produced in small batches to ensure quality and reduce waste

Smooth Writing and Rich Expression

  • Flows consistently with excellent shading or sheen (varies by color)
  • Known for excellent quality and consistent color performance
  • Compatible with a wide range of fountain pens

Inspired by the diverse landscapes of Australia, True Blue brings personality and clarity to your writing - whether journaling, sketching, or everyday note-taking.

Brand Robert Oster
Size/Dimensions8.7 x 3.3 x 3.2 cm
Volume50ml
Ink NameTrue Blue
Ink Properties Non Shimmer, Dye-based

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