Plumb Nut – 50ml

Robert Oster Signature Ink – Plumb Nut

Discover Plumb Nut, 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, Plumb Nut brings personality and clarity to your writing – whether journaling, sketching, or everyday note-taking.