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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 Australian Opal Blue - 2ml Ink Sample

Australian Opal Blue - 2ml

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$1.70

$1.36

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Robert Oster Australian Opal Blue - 2ml Ink Sample

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Australian Opal Blue - 2ml

$1.70 $1.36

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Robert Oster “Signature” fountain-pen ink in Clearwater Rain, 50ml bottle, with a gold label, shown with a deep teal/blue-green ink swatch.

Clearwater Rain - 50ml

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$23.00

$18.40

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Robert Oster “Signature” fountain-pen ink in Clearwater Rain, 50ml bottle, with a gold label, shown with a deep teal/blue-green ink swatch.

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Clearwater Rain - 50ml

$23.00 $18.40

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Robert Oster Cherry Blossom - 50ml fountain pen ink in a sleek black bottle, featuring a gold-foil label and a circular swatch of dusty magenta/purple shade.

Cherry Blossom - 50ml

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$23.00

$18.40

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Robert Oster Cherry Blossom - 50ml fountain pen ink in a sleek black bottle, featuring a gold-foil label and a circular swatch of dusty magenta/purple shade.

Sale

Cherry Blossom - 50ml

$23.00 $18.40

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2ml sample of Robert Oster's Lemon Grass ink, featuring a dark olive-green swatch with textured, irregular edges on a white background, watermarked The Desk Bandit.

Lemon Grass - 2ml

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$1.70

$1.36

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2ml sample of Robert Oster's Lemon Grass ink, featuring a dark olive-green swatch with textured, irregular edges on a white background, watermarked The Desk Bandit.

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Lemon Grass - 2ml

$1.70 $1.36

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Robert Oster Australis Rose - 50ml Bottled Ink

Australis Rose - 50ml

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$23.00

$18.40

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Robert Oster Australis Rose - 50ml Bottled Ink

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Australis Rose - 50ml

$23.00 $18.40

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Pinky - 2ml

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$1.70

$1.36

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Pinky - 2ml

$1.70 $1.36

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Robert Oster Mystic Storm - 2ml Ink Sample

Mystic Storm - 2ml

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$1.70

$1.36

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Robert Oster Mystic Storm - 2ml Ink Sample

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Mystic Storm - 2ml

$1.70 $1.36

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Marrone Mustard - 2ml ink sample, dark brown blot on white, featuring The Desk Bandit watermark, representing Robert Oster's dye-based ink.

Marrone Mustard - 2ml

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$1.70

$1.36

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Marrone Mustard - 2ml ink sample, dark brown blot on white, featuring The Desk Bandit watermark, representing Robert Oster's dye-based ink.

Sale

Marrone Mustard - 2ml

$1.70 $1.36

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Blue Sea - 2ml ink sample by Robert Oster, showing deep blue with reddish-purple sheen on white paper, featuring The Desk Bandit watermark.

Blue Sea - 2ml

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$1.70

$1.36

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Blue Sea - 2ml ink sample by Robert Oster, showing deep blue with reddish-purple sheen on white paper, featuring The Desk Bandit watermark.

Sale

Blue Sea - 2ml

$1.70 $1.36

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Robert Oster Muddy Sand - 2ml Ink Sample

Muddy Sand - 2ml

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$1.70

$1.36

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Robert Oster Muddy Sand - 2ml Ink Sample

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Muddy Sand - 2ml

$1.70 $1.36

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Robert Oster Muddy Crown - 2ml Ink Sample

Muddy Crown - 2ml

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$1.70

$1.36

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Robert Oster Muddy Crown - 2ml Ink Sample

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Muddy Crown - 2ml

$1.70 $1.36

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Robert Oster Signature Honey Bee fountain-pen ink, 50ml bottle, shown with a metallic gold swatch, inspired by South Australia's vibrant palette.

Honey Bee - 50ml

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$23.00

$18.40

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Robert Oster Signature Honey Bee fountain-pen ink, 50ml bottle, shown with a metallic gold swatch, inspired by South Australia's vibrant palette.

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Honey Bee - 50ml

$23.00 $18.40

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Bottle of Robert Oster “Signature” fountain-pen ink, labeled “Deep Sea - 50ml,” with a gold-foil label and blue ink swatch featuring a red/purple sheen.

Deep Sea - 50ml

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$23.00

$18.40

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Bottle of Robert Oster “Signature” fountain-pen ink, labeled “Deep Sea - 50ml,” with a gold-foil label and blue ink swatch featuring a red/purple sheen.

Sale

Deep Sea - 50ml

$23.00 $18.40

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Lipstick Red - 2ml

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$1.70

$1.36

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Sale

Lipstick Red - 2ml

$1.70 $1.36

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Blue Lagoon - 2ml ink sample, featuring an abstract blot of bright blue with darker purplish gradients, showcasing Robert Oster's dye-based ink. Watermark: THE DESK BANDIT.

Blue Lagoon - 2ml

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$1.70

$1.36

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Blue Lagoon - 2ml ink sample, featuring an abstract blot of bright blue with darker purplish gradients, showcasing Robert Oster's dye-based ink. Watermark: THE DESK BANDIT.

Sale

Blue Lagoon - 2ml

$1.70 $1.36

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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 Signature Velvet Storm ink, 50ml bottle with gold label, displayed with a teal-blue ink swatch featuring a red sheen.

Velvet Storm - 50ml

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$23.00

$18.40

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Robert Oster Signature Velvet Storm ink, 50ml bottle with gold label, displayed with a teal-blue ink swatch featuring a red sheen.

/ 1 / 2

Sale

Velvet Storm - 50ml

$23.00 $18.40

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Robert Oster “Signature” Morning Mist - 50ml fountain-pen ink bottle with a gold label, displayed with a bright turquoise/teal swatch, dye-based and inspired by South Australia.

Morning Mist - 50ml

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$23.00

$18.40

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Robert Oster “Signature” Morning Mist - 50ml fountain-pen ink bottle with a gold label, displayed with a bright turquoise/teal swatch, dye-based and inspired by South Australia.

Sale

Morning Mist - 50ml

$23.00 $18.40

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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.

/ 1 / 2

Sale

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.

/ 1 / 2

Sale

Whisper Red - 2ml

$1.70 $1.36

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African Gold - 50ml Robert Oster ink, in a black glass bottle with a ribbed cap and gold label, shown alongside a warm golden-brown color swatch.

African Gold - 50ml

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$23.00

$18.40

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African Gold - 50ml Robert Oster ink, in a black glass bottle with a ribbed cap and gold label, shown alongside a warm golden-brown color swatch.

/ 1 / 2

Sale

African Gold - 50ml

$23.00 $18.40

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Aussie Gold - 50ml fountain pen ink by Robert Oster, displayed with its black bottle featuring a gold label and a circular yellow-gold ink swatch.

Aussie Gold - 50ml

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$23.00

$18.40

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Aussie Gold - 50ml fountain pen ink by Robert Oster, displayed with its black bottle featuring a gold label and a circular yellow-gold ink swatch.

/ 1 / 2

Sale

Aussie Gold - 50ml

$23.00 $18.40

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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

More Details →

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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Sale

Sinner's Blood - 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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Blue Water Ice - 50ml: Robert Oster “Signature” fountain-pen ink in a sleek black bottle with gold-foil label, featuring a vibrant blue ink swatch.

Blue Water Ice - 50ml

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$23.00

$18.40

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Blue Water Ice - 50ml: Robert Oster “Signature” fountain-pen ink in a sleek black bottle with gold-foil label, featuring a vibrant blue ink swatch.

Sale

Blue Water Ice - 50ml

$23.00 $18.40

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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

More Details →

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.

/ 1 / 2

Sale

Frankly Scarlet - 2ml

$1.70 $1.36

More Details →

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

X

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

More Details →

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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