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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 Australis Rose - 50ml Bottled Ink

Australis Rose - 50ml

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$23.00

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Robert Oster Australis Rose - 50ml Bottled Ink

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Australis Rose - 50ml

$23.00

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Robert Oster Signature Toffee ink, 50ml bottle with black ribbed cap and gold label, showcases a warm coppery-brown hue, inspired by South Australia's palette.

Toffee - 50ml

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$23.00

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Robert Oster Signature Toffee ink, 50ml bottle with black ribbed cap and gold label, showcases a warm coppery-brown hue, inspired by South Australia's palette.

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Toffee - 50ml

$23.00

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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

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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

$23.00

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Lipstick Red - 2ml

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$1.70

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Lipstick Red - 2ml

$1.70

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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

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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

$1.70

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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

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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

$1.70

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Tinseltown (Shake 'N' Shimmy) - 2ml

Tinseltown (Shake 'N' Shimmy) - 2ml

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$2.00

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Tinseltown (Shake 'N' Shimmy) - 2ml

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Tinseltown (Shake 'N' Shimmy) - 2ml

$2.00

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Muddy Sand - 2ml

Muddy Sand - 2ml

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$1.70

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Muddy Sand - 2ml

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Muddy Sand - 2ml

$1.70

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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

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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.

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Velvet Storm - 50ml

$23.00

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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

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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

$1.70

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Detox - 2ml

Detox - 2ml

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$1.70

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Detox - 2ml

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Detox - 2ml

$1.70

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Ten Dollar Teal - 2ml

Ten Dollar Teal - 2ml

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$1.70

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Ten Dollar Teal - 2ml

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Ten Dollar Teal - 2ml

$1.70

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Muddy Crown - 2ml

Muddy Crown - 2ml

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$1.70

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Muddy Crown - 2ml

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Muddy Crown - 2ml

$1.70

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Las Vegas (Shake 'N' Shimmy) - 2ml

Las Vegas (Shake 'N' Shimmy) - 2ml

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$2.00

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Las Vegas (Shake 'N' Shimmy) - 2ml

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Las Vegas (Shake 'N' Shimmy) - 2ml

$2.00

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Robert Oster Blue Moon (Shake 'N' Shimmy) - 2ml Ink Sample

Blue Moon (Shake 'N' Shimmy) - 2ml

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$2.00

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Robert Oster Blue Moon (Shake 'N' Shimmy) - 2ml Ink Sample

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Blue Moon (Shake 'N' Shimmy) - 2ml

$2.00

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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

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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

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NG Special '16 - 50ml, Robert Oster Signature fountain-pen ink in an elegant black glass bottle with a gold seal, featuring orange-toned ink.

NG Special '16 - 50ml

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$23.00

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NG Special '16 - 50ml, Robert Oster Signature fountain-pen ink in an elegant black glass bottle with a gold seal, featuring orange-toned ink.

NG Special '16 - 50ml

$23.00

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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

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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.

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African Gold - 50ml

$23.00

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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

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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

$23.00

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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

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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.

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Aussie Gold - 50ml

$23.00

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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

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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

$1.70

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Muddy Grass - 2ml

Muddy Grass - 2ml

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$1.70

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Muddy Grass - 2ml

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Muddy Grass - 2ml

$1.70

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Muddy Wine - 2ml

Muddy Wine - 2ml

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$1.70

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Muddy Wine - 2ml

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Muddy Wine - 2ml

$1.70

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Robert Oster Citrus - 2ml Ink Sample

Citrus - 2ml

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$1.70

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Robert Oster Citrus - 2ml Ink Sample

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Citrus - 2ml

$1.70

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Robert Oster Australis Hydra - 2ml Ink Sample

Australis Hydra - 2ml

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$1.70

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Robert Oster Australis Hydra - 2ml Ink Sample

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Australis Hydra - 2ml

$1.70

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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

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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

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Robert Oster Black 'N' Blue (Shake 'N' Shimmy) - 50ml Bottled Ink

Black 'N' Blue (Shake 'N' Shimmy) - 50ml

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$31.00

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Robert Oster Black 'N' Blue (Shake 'N' Shimmy) - 50ml Bottled Ink

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Black 'N' Blue (Shake 'N' Shimmy) - 50ml

$31.00

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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

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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

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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

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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

$23.00

More Details →

Jewel in the Crown (Shake 'N' Shimmy) - 2ml

Jewel in the Crown (Shake 'N' Shimmy) - 2ml

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$2.00

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Jewel in the Crown (Shake 'N' Shimmy) - 2ml

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Jewel in the Crown (Shake 'N' Shimmy) - 2ml

$2.00

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Robert Oster Dark Chocolate - 2ml Ink Sample

Dark Chocolate - 2ml

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$1.70

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Robert Oster Dark Chocolate - 2ml Ink Sample

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Dark Chocolate - 2ml

$1.70

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Robert Oster Ocean - 2ml Ink Sample

Ocean - 2ml

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$1.70

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Robert Oster Ocean - 2ml Ink Sample

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Ocean - 2ml

$1.70

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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

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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

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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

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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

$1.70

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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

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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

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Brandy - 2ml

Brandy - 2ml

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$1.70

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Brandy - 2ml

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Brandy - 2ml

$1.70

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Muddy Bucket - 2ml

Muddy Bucket - 2ml

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$1.70

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Muddy Bucket - 2ml

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Muddy Bucket - 2ml

$1.70

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Miami - 2ml

Miami - 2ml

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$1.70

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Miami - 2ml

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Miami - 2ml

$1.70

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Robert Oster Silent Nite - 2ml Ink Sample

Silent Nite - 2ml

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$1.70

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Robert Oster Silent Nite - 2ml Ink Sample

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Silent Nite - 2ml

$1.70

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Robert Oster Australian Opal Pink - 50ml Bottled Ink

Australian Opal Pink - 50ml

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$23.00

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Robert Oster Australian Opal Pink - 50ml Bottled Ink

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Australian Opal Pink - 50ml

$23.00

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