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Robert Oster

Explore our collection of Robert Oster Signature Inks – made in Australia and described as well-behaved fountain pen inks. Each ink is produced in a just-in-time manner to meet demand and is bottled in recyclable PET plastic. Robert Oster inks are non-toxic and eco-friendly, crafted with care for both writing performance and environmental impact.

Looking for the full range or more? Browse all bottled fountain pen inks or shop ink samples to try before you commit.

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Robert Oster Muddy Grass - 2ml Ink Sample

Muddy Grass - 2ml

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$1.70

$1.36

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Robert Oster Muddy Grass - 2ml Ink Sample

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Muddy Grass - 2ml

$1.70 $1.36

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Robert Oster Citrus - 2ml Ink Sample

Citrus - 2ml

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$1.70

$1.36

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Robert Oster Citrus - 2ml Ink Sample

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Citrus - 2ml

$1.70 $1.36

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Robert Oster Detox - 2ml Ink Sample

Detox - 2ml

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$1.70

$1.36

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Robert Oster Detox - 2ml Ink Sample

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Detox - 2ml

$1.70 $1.36

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Robert Oster Ten Dollar Teal - 2ml Ink Sample

Ten Dollar Teal - 2ml

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$1.70

$1.36

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Robert Oster Ten Dollar Teal - 2ml Ink Sample

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Ten Dollar Teal - 2ml

$1.70 $1.36

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Robert Oster Muddy Wine - 2ml Ink Sample

Muddy Wine - 2ml

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$1.70

$1.36

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Robert Oster Muddy Wine - 2ml Ink Sample

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Muddy Wine - 2ml

$1.70 $1.36

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Robert Oster Australis Hydra - 2ml Ink Sample

Australis Hydra - 2ml

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$1.70

$1.36

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Robert Oster Australis Hydra - 2ml Ink Sample

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Australis Hydra - 2ml

$1.70 $1.36

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Blood Crimson - 2ml fountain pen ink sample, showcasing a deep red, irregular swatch with tonal variations, perfect for testing color and flow.

Blood Crimson - 2ml

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$1.70

$1.36

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Blood Crimson - 2ml fountain pen ink sample, showcasing a deep red, irregular swatch with tonal variations, perfect for testing color and flow.

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Blood Crimson - 2ml

$1.70 $1.36

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Swatch of Robert Oster's Whisper Red ink, 2ml sample, displaying varied tone intensity on a white background, highlighting its dye-based pigment characteristics.

Whisper Red - 2ml

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$1.70

$1.36

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Swatch of Robert Oster's Whisper Red ink, 2ml sample, displaying varied tone intensity on a white background, highlighting its dye-based pigment characteristics.

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Whisper Red - 2ml

$1.70 $1.36

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Abstract green watercolor resembling Robert Oster's Green Lime ink sample, with soft edges and tonal variations. 2ml dye-based ink, perfect for vibrant writing.

Green Lime - 2ml

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$1.70

$1.36

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Abstract green watercolor resembling Robert Oster's Green Lime ink sample, with soft edges and tonal variations. 2ml dye-based ink, perfect for vibrant writing.

Sale

Green Lime - 2ml

$1.70 $1.36

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Swatch of Robert Oster's Burgundy ink in 2ml, showing deep red hues with darker pooled areas and irregular edges on white paper.

Burgundy - 2ml

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$1.70

$1.36

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Swatch of Robert Oster's Burgundy ink in 2ml, showing deep red hues with darker pooled areas and irregular edges on white paper.

Sale

Burgundy - 2ml

$1.70 $1.36

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Robert Oster Dark Chocolate - 2ml Ink Sample

Dark Chocolate - 2ml

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$1.70

$1.36

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Robert Oster Dark Chocolate - 2ml Ink Sample

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Dark Chocolate - 2ml

$1.70 $1.36

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Robert Oster Ocean - 2ml Ink Sample

Ocean - 2ml

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$1.70

$1.36

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Robert Oster Ocean - 2ml Ink Sample

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Ocean - 2ml

$1.70 $1.36

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Robert Oster Signature Ink - Sinner's Blood, 50ml, deep burgundy fountain pen ink with rich texture, highlighting sustainable Australian craftsmanship and exceptional writing performance.

Sinner's Blood - 2ml

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$1.70

$1.36

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Robert Oster Signature Ink - Sinner's Blood, 50ml, deep burgundy fountain pen ink with rich texture, highlighting sustainable Australian craftsmanship and exceptional writing performance.

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Sinner's Blood - 2ml

$1.70 $1.36

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Sepia Nights - 2ml

Sepia Nights - 2ml

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$1.70

$1.36

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Sepia Nights - 2ml

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Sepia Nights - 2ml

$1.70 $1.36

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Robert Oster Silent Nite - 2ml Ink Sample

Silent Nite - 2ml

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$1.70

$1.36

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Robert Oster Silent Nite - 2ml Ink Sample

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Silent Nite - 2ml

$1.70 $1.36

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Frankly Scarlet - 2ml ink sample, displaying a deep burgundy-red wash with subtle variations, highlighting Robert Oster's dye-based pigment on paper.

Frankly Scarlet - 2ml

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$1.70

$1.36

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Frankly Scarlet - 2ml ink sample, displaying a deep burgundy-red wash with subtle variations, highlighting Robert Oster's dye-based pigment on paper.

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Frankly Scarlet - 2ml

$1.70 $1.36

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Robert Oster's Royal Red - 2ml ink sample swatch on white paper, showcasing its rich pigment and shading with The Desk Bandit watermark faintly visible.

Royal Red - 2ml

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$1.70

$1.36

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Robert Oster's Royal Red - 2ml ink sample swatch on white paper, showcasing its rich pigment and shading with The Desk Bandit watermark faintly visible.

Sale

Royal Red - 2ml

$1.70 $1.36

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Red Orange - 2ml ink sample, featuring an abstract red-orange splash on white. The Desk Bandit watermark subtly appears at the bottom.

Red Orange - 2ml

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$1.70

$1.36

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Red Orange - 2ml ink sample, featuring an abstract red-orange splash on white. The Desk Bandit watermark subtly appears at the bottom.

Sale

Red Orange - 2ml

$1.70 $1.36

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Robert Oster Brandy - 2ml Ink Sample

Brandy - 2ml

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$1.70

$1.36

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Robert Oster Brandy - 2ml Ink Sample

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Brandy - 2ml

$1.70 $1.36

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Robert Oster Miami - 2ml Ink Sample

Miami - 2ml

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$1.70

$1.36

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Robert Oster Miami - 2ml Ink Sample

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Miami - 2ml

$1.70 $1.36

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Ever Green - 2ml ink sample, deep green with dark sheen, displayed as an abstract swatch on paper, from The Desk Bandit's fountain-pen ink collection.

Ever Green - 2ml

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$1.70

$1.36

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Ever Green - 2ml ink sample, deep green with dark sheen, displayed as an abstract swatch on paper, from The Desk Bandit's fountain-pen ink collection.

Sale

Ever Green - 2ml

$1.70 $1.36

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Frankly Blue - 2ml ink sample, showcasing dark-blue swatch with watery edges on white paper, featuring THE DESK BANDIT watermark at the bottom.

Frankly Blue - 2ml

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$1.70

$1.36

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Frankly Blue - 2ml ink sample, showcasing dark-blue swatch with watery edges on white paper, featuring THE DESK BANDIT watermark at the bottom.

Sale

Frankly Blue - 2ml

$1.70 $1.36

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Robert Oster Napa - 2ml Ink Sample

Napa - 2ml

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$1.70

$1.36

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Robert Oster Napa - 2ml Ink Sample

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Napa - 2ml

$1.70 $1.36

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Robert Oster Signature Ink Sinner's Heart, 50ml fountain pen ink, showcases a deep burgundy watercolor-like texture, emphasizing sustainable Australian craftsmanship and vibrant writing expression.

Sinner's Heart - 2ml

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$1.70

$1.36

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Robert Oster Signature Ink Sinner's Heart, 50ml fountain pen ink, showcases a deep burgundy watercolor-like texture, emphasizing sustainable Australian craftsmanship and vibrant writing expression.

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Sale

Sinner's Heart - 2ml

$1.70 $1.36

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Robert Oster Blue Martini - 2ml Ink Sample

Blue Martini - 2ml

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$1.70

$1.36

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Robert Oster Blue Martini - 2ml Ink Sample

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Blue Martini - 2ml

$1.70 $1.36

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Robert Oster Ten Dollar Gold - 2ml Ink Sample

Ten Dollar Gold - 2ml

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$1.70

$1.36

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Robert Oster Ten Dollar Gold - 2ml Ink Sample

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Ten Dollar Gold - 2ml

$1.70 $1.36

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Robert Oster Muddy Dragon - 2ml Ink Sample

Muddy Dragon - 2ml

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$1.70

$1.36

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Robert Oster Muddy Dragon - 2ml Ink Sample

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Muddy Dragon - 2ml

$1.70 $1.36

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Robert Oster Muddy Water - 2ml Ink Sample

Muddy Water - 2ml

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$1.70

$1.36

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Robert Oster Muddy Water - 2ml Ink Sample

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Muddy Water - 2ml

$1.70 $1.36

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Robert Oster Gummy Shark fountain pen ink swatch, showcasing a mottled purple texture. A vibrant, eco-friendly ink, reflecting Australia's landscapes, in a 50ml bottle.

Gummy Shark - 2ml

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$1.70

$1.36

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Robert Oster Gummy Shark fountain pen ink swatch, showcasing a mottled purple texture. A vibrant, eco-friendly ink, reflecting Australia's landscapes, in a 50ml bottle.

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Gummy Shark - 2ml

$1.70 $1.36

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Robert Oster Ten Dollar Green - 2ml Ink Sample

Ten Dollar Green - 2ml

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$1.70

$1.36

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Robert Oster Ten Dollar Green - 2ml Ink Sample

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Ten Dollar Green - 2ml

$1.70 $1.36

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Robert Oster Flaming Blue - 2ml Ink Sample

Flaming Blue - 2ml

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$1.70

$1.36

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Robert Oster Flaming Blue - 2ml Ink Sample

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Flaming Blue - 2ml

$1.70 $1.36

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Robert Oster Ten Dollar Blue - 2ml Ink Sample

Ten Dollar Blue - 2ml

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$1.70

$1.36

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Robert Oster Ten Dollar Blue - 2ml Ink Sample

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Ten Dollar Blue - 2ml

$1.70 $1.36

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Robert Oster Oklahoma City - 2ml Ink Sample

Oklahoma City - 2ml

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$1.70

$1.36

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Robert Oster Oklahoma City - 2ml Ink Sample

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Oklahoma City - 2ml

$1.70 $1.36

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Robert Oster Kansas City - 2ml Ink Sample

Kansas City - 2ml

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$1.70

$1.36

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Robert Oster Kansas City - 2ml Ink Sample

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Kansas City - 2ml

$1.70 $1.36

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Robert Oster NYC USA - 2ml Ink Sample

NYC USA - 2ml

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$1.70

$1.36

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Robert Oster NYC USA - 2ml Ink Sample

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NYC USA - 2ml

$1.70 $1.36

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Steely Days - 2ml

Steely Days - 2ml

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$1.70

$1.36

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Steely Days - 2ml

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Steely Days - 2ml

$1.70 $1.36

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Robert Oster New York - 2ml Ink Sample

New York - 2ml

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$1.70

$1.36

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Robert Oster New York - 2ml Ink Sample

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New York - 2ml

$1.70 $1.36

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Sinner's Poison - 50ml is a warm brown-gold Robert Oster fountain pen ink with a soft, mottled texture, reflecting sustainable, vibrant color expression.

Sinner's Poison - 2ml

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$1.70

$1.36

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Sinner's Poison - 50ml is a warm brown-gold Robert Oster fountain pen ink with a soft, mottled texture, reflecting sustainable, vibrant color expression.

/ 1 / 2

Sale

Sinner's Poison - 2ml

$1.70 $1.36

More Details →

Robert Oster Elfs Cap - 2ml Ink Sample

Elfs Cap - 2ml

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$1.70

$1.36

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Robert Oster Elfs Cap - 2ml Ink Sample

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Elfs Cap - 2ml

$1.70 $1.36

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Robert Oster Signature Ink - Sinner's Weed, 50ml; textured green watercolor swatch, reflecting vibrant, eco-friendly, Australian-made fountain pen ink for smooth writing.

Sinner's Weed - 2ml

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$1.70

$1.36

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Robert Oster Signature Ink - Sinner's Weed, 50ml; textured green watercolor swatch, reflecting vibrant, eco-friendly, Australian-made fountain pen ink for smooth writing.

/ 1 / 2

Sale

Sinner's Weed - 2ml

$1.70 $1.36

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