Robert Oster bottle ink, Cosmic Swirl, 50ml

Robert Oster Signature Ink Collection

Crafted in South Australia, the Robert Oster Signature Collection showcases the creator’s most iconic and expressive colours. Inspired by the Australian landscape, each ink is blended with care to deliver smooth flow, rich shading, and vibrant personality on the page.

This flagship collection features the full spectrum of Robert Oster’s artistic vision — from calm, earthy tones to bold, energetic hues — offering writers and artists a reliable, beautifully performing ink for every style and mood.

A drink for your pen.

The Remarkable Robert Oster

Robert Oster is a South Australian colour creator whose inks reflect his passion, creativity, and deep connection to the Australian landscape. His colours are known worldwide for their beautiful shading, reliability, and expressive character on the page.

Robert Oster Signature Inks are handmade in Australia, inspired by the colours of the continent. They are presented in recyclable 50ml PET bottles, manufactured in Australia's first carbon neutral plastics plant. All Robert Oster inks are 100% Australian made and non-toxic, created with care for both the writer and the environment.

Based in South Australia, the same state as Pencraft, Robert Oster’s work continues to inspire writers, artists, and collectors around the world.