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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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Dragon's Night - 50ml fountain pen ink bottle with a gold label. Inset shows vivid blue ink with brown-bronze sheen edges.

Dragon's Night - 50ml

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$23.00

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Dragon's Night - 50ml fountain pen ink bottle with a gold label. Inset shows vivid blue ink with brown-bronze sheen edges.

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Dragon's Night - 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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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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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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Australis Hydra (2ml) - The Desk Bandit

Australis Hydra - 2ml

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$1.70

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Australis Hydra (2ml) - The Desk Bandit

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Australis Hydra - 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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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

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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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Silent Nite (2ml) - The Desk Bandit

Silent Nite - 2ml

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$1.70

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Silent Nite (2ml) - The Desk Bandit

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Silent Nite - 2ml

$1.70

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GoGo - 50ml Robert Oster Signature ink bottle, vibrant blue with metallic sheen, eco-friendly, crafted in Australia for smooth fountain pen writing.

GoGo - 50ml

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$23.00

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GoGo - 50ml Robert Oster Signature ink bottle, vibrant blue with metallic sheen, eco-friendly, crafted in Australia for smooth fountain pen writing.

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GoGo - 50ml

$23.00

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Robert Oster Bishop to King - 50ml Bottled Ink

Bishop to King - 50ml

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$23.00

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Robert Oster Bishop to King - 50ml Bottled Ink

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Bishop to King - 50ml

$23.00

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Robert Oster “Signature” fountain-pen ink, Great Southern Ocean - 50ml, in a black glass bottle with gold label, ribbed cap, and blue-gray ink swatch.

Great Southern Ocean - 50ml

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$23.00

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Robert Oster “Signature” fountain-pen ink, Great Southern Ocean - 50ml, in a black glass bottle with gold label, ribbed cap, and blue-gray ink swatch.

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Great Southern Ocean - 50ml

$23.00

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Robert Oster Signature Ink - Australian Opal Blue, 50ml bottle, shown with a blue ink swatch, emphasizing sustainable, vibrant performance for fountain pen use.

Australian Opal Blue - 50ml

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$23.00

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Robert Oster Signature Ink - Australian Opal Blue, 50ml bottle, shown with a blue ink swatch, emphasizing sustainable, vibrant performance for fountain pen use.

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Australian Opal Blue - 50ml

$23.00

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Robert Oster Lake of Fire ink, 50ml bottle, features a gold label and deep blue hue with a subtle red sheen, inspired by South Australia.

Lake of Fire - 50ml

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$23.00

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Robert Oster Lake of Fire ink, 50ml bottle, features a gold label and deep blue hue with a subtle red sheen, inspired by South Australia.

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Lake of Fire - 50ml

$23.00

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Robert Oster Bondi Blue fountain-pen ink, 50ml bottle, features a gold-foil label. Includes a vibrant blue ink swatch with darker sheen hints.

Bondi Blue - 50ml

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$23.00

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Robert Oster Bondi Blue fountain-pen ink, 50ml bottle, features a gold-foil label. Includes a vibrant blue ink swatch with darker sheen hints.

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Bondi Blue - 50ml

$23.00

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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

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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

$1.70

More Details →

Bottle of Robert Oster Signature Ink, Taiwan Blue - 50ml, with a teal swatch displaying a pinky-red sheen, emphasizing vibrant, sustainable, and smooth-writing qualities.

Taiwan Blue - 50ml

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$23.00

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Bottle of Robert Oster Signature Ink, Taiwan Blue - 50ml, with a teal swatch displaying a pinky-red sheen, emphasizing vibrant, sustainable, and smooth-writing qualities.

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Taiwan Blue - 50ml

$23.00

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Ten Dollar Blue - 2ml

Ten Dollar Blue - 2ml

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$1.70

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Ten Dollar Blue - 2ml

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Ten Dollar Blue - 2ml

$1.70

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Muddy Water - 2ml

Muddy Water - 2ml

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$1.70

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Muddy Water - 2ml

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Muddy Water - 2ml

$1.70

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Robert Oster Flaming Blue - 2ml Ink Sample

Flaming Blue - 2ml

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$1.70

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Robert Oster Flaming Blue - 2ml Ink Sample

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Flaming Blue - 2ml

$1.70

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Robert Oster Signature ink bottle, Carbon Fire - 50ml, featuring a dark blue shade swatch in the corner, inspired by South Australian wine regions.

Carbon Fire - 50ml

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$23.00

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Robert Oster Signature ink bottle, Carbon Fire - 50ml, featuring a dark blue shade swatch in the corner, inspired by South Australian wine regions.

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Carbon Fire - 50ml

$23.00

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Robert Oster Signature fountain pen ink bottle, Australian Sky Blue - 50ml, with a bright blue ink swatch, featuring a gold label.

Australian Sky Blue - 50ml

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$23.00

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Robert Oster Signature fountain pen ink bottle, Australian Sky Blue - 50ml, with a bright blue ink swatch, featuring a gold label.

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Australian Sky Blue - 50ml

$23.00

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Romeo & Juliet - 50ml

Romeo & Juliet - 50ml

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$23.00

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Romeo & Juliet - 50ml

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Romeo & Juliet - 50ml

$23.00

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Blue Martini - 2ml

Blue Martini - 2ml

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$1.70

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Blue Martini - 2ml

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Blue Martini - 2ml

$1.70

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Bottle of Robert Oster Signature “True Blue” fountain-pen ink, 50ml, with gold-foil label, shown next to a deep blue color swatch with red sheen.

True Blue - 50ml

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$23.00

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Bottle of Robert Oster Signature “True Blue” fountain-pen ink, 50ml, with gold-foil label, shown next to a deep blue color swatch with red sheen.

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True Blue - 50ml

$23.00

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NYC USA - 2ml

NYC USA - 2ml

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$1.70

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NYC USA - 2ml

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NYC USA - 2ml

$1.70

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Australis Hydra - 50ml - The Desk Bandit

Australis Hydra - 50ml

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$23.00

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Australis Hydra - 50ml - The Desk Bandit

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Australis Hydra - 50ml

$23.00

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Bottle of Robert Oster Signature fountain-pen ink in Bass Straight - 50ml, featuring a gold label and vibrant blue ink swatch.

Bass Straight - 50ml

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$23.00

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Bottle of Robert Oster Signature fountain-pen ink in Bass Straight - 50ml, featuring a gold label and vibrant blue ink swatch.

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Bass Straight - 50ml

$23.00

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Blue Sea - 50ml

Blue Sea - 50ml

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$23.00

X

Blue Sea - 50ml

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Blue Sea - 50ml

$23.00

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Robert Oster Signature Ink bottle, 50ml, labeled Evening Sapphire, with a round swatch displaying its dark blue hue, inspired by South Australia's wine regions.

Evening Sapphire - 50ml

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$23.00

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Robert Oster Signature Ink bottle, 50ml, labeled Evening Sapphire, with a round swatch displaying its dark blue hue, inspired by South Australia's wine regions.

Evening Sapphire - 50ml

$23.00

More Details →

Bottle of Robert Oster “Signature” Blue Black fountain-pen ink, 50ml, with a deep inky blue swatch showing subtle red-sheen flecks, reflecting Australian inspirations.

Blue Black - 50ml

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$23.00

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Bottle of Robert Oster “Signature” Blue Black fountain-pen ink, 50ml, with a deep inky blue swatch showing subtle red-sheen flecks, reflecting Australian inspirations.

Blue Black - 50ml

$23.00

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Bottle of Robert Oster “Signature” fountain pen ink, School Blue - 50ml, with a ribbed black cap, gold label, and a deep shimmery blue ink swatch.

School Blue - 50ml

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$23.00

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Bottle of Robert Oster “Signature” fountain pen ink, School Blue - 50ml, with a ribbed black cap, gold label, and a deep shimmery blue ink swatch.

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School Blue - 50ml

$23.00

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Robert Oster Signature Ink Flaming Blue - 50ml bottle, featuring a gold label and black cap, with a swatch showcasing the deep, rich blue ink color.

Flaming Blue - 50ml

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$23.00

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Robert Oster Signature Ink Flaming Blue - 50ml bottle, featuring a gold label and black cap, with a swatch showcasing the deep, rich blue ink color.

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Flaming Blue - 50ml

$23.00

More Details →

Blue Denim - 50ml bottle of Robert Oster Signature fountain-pen ink, featuring a black bottle with a gold label and a deep blue ink swatch with reddish sheen.

Blue Denim - 50ml

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$23.00

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Blue Denim - 50ml bottle of Robert Oster Signature fountain-pen ink, featuring a black bottle with a gold label and a deep blue ink swatch with reddish sheen.

Blue Denim - 50ml

$23.00

More Details →

Steely Days - 2ml

Steely Days - 2ml

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$1.70

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Steely Days - 2ml

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Steely Days - 2ml

$1.70

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Robert Oster Tokyo Blue Denim - 50ml Bottled Ink

Tokyo Blue Denim - 50ml

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$23.00

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Robert Oster Tokyo Blue Denim - 50ml Bottled Ink

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Tokyo Blue Denim - 50ml

$23.00

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Blue Lagoon - 50ml Robert Oster ink in a sleek black-and-gold bottle, shown with a vibrant blue swatch, inspired by South Australia's palette.

Blue Lagoon - 50ml

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$23.00

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Blue Lagoon - 50ml Robert Oster ink in a sleek black-and-gold bottle, shown with a vibrant blue swatch, inspired by South Australia's palette.

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Blue Lagoon - 50ml

$23.00

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Robert Oster Torquay 50ml ink bottle, featuring a black ribbed cap and gold-foil label, shown with a bright turquoise circular swatch.

Torquay - 50ml

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$23.00

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Robert Oster Torquay 50ml ink bottle, featuring a black ribbed cap and gold-foil label, shown with a bright turquoise circular swatch.

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Torquay - 50ml

$23.00

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Robert Oster Signature Turquoise fountain-pen ink, 50ml bottle with black cap and gold label, shown with a circular swatch of its vibrant color.

Turquoise - 50ml

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$23.00

X

Robert Oster Signature Turquoise fountain-pen ink, 50ml bottle with black cap and gold label, shown with a circular swatch of its vibrant color.

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Turquoise - 50ml

$23.00

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