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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 Pink - 50ml Bottled Ink

Australian Opal Pink - 50ml

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$23.00

$18.40

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Robert Oster Australian Opal Pink - 50ml Bottled Ink

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Australian Opal Pink - 50ml

$23.00 $18.40

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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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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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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

$18.40

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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 $18.40

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Robert Oster Signature Ink - Plumb Nut 50ml: Cylindrical black bottle with a gold label, showcasing a unique dusty rose ink swatch in the upper right corner.

Plumb Nut - 50ml

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$23.00

$18.40

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Robert Oster Signature Ink - Plumb Nut 50ml: Cylindrical black bottle with a gold label, showcasing a unique dusty rose ink swatch in the upper right corner.

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Plumb Nut - 50ml

$23.00 $18.40

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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

$18.40

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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 $18.40

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Robert Oster Bishop to King - 50ml Bottled Ink

Bishop to King - 50ml

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$23.00

$18.40

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Robert Oster Bishop to King - 50ml Bottled Ink

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Bishop to King - 50ml

$23.00 $18.40

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Robert Oster Khakhi - 50ml ink bottle with black cap and gold seal, featuring a grayish base swatch with warm gold sheen.

Khakhi - 50ml

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$23.00

$18.40

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Robert Oster Khakhi - 50ml ink bottle with black cap and gold seal, featuring a grayish base swatch with warm gold sheen.

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Khakhi - 50ml

$23.00 $18.40

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Smokescreen - 50ml bottle of Robert Oster Signature dye-based ink, featuring a circular swatch of its unique color, inspired by South Australia's wine regions.

Smokescreen - 50ml

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$23.00

$18.40

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Smokescreen - 50ml bottle of Robert Oster Signature dye-based ink, featuring a circular swatch of its unique color, inspired by South Australia's wine regions.

Sale

Smokescreen - 50ml

$23.00 $18.40

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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

$18.40

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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 $18.40

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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 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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Sinner's Heart - 2ml

$1.70 $1.36

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Robert Oster Signature fountain-pen ink in Motor Oil, 50ml bottle, features a swatch displaying its unique shade inspired by South Australian wine regions.

Motor Oil - 50ml

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$23.00

$18.40

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Robert Oster Signature fountain-pen ink in Motor Oil, 50ml bottle, features a swatch displaying its unique shade inspired by South Australian wine regions.

Sale

Motor Oil - 50ml

$23.00 $18.40

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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

$18.40

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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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Sale

Lake of Fire - 50ml

$23.00 $18.40

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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

$18.40

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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 $18.40

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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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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

$18.40

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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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Sale

Taiwan Blue - 50ml

$23.00 $18.40

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Robert Oster Signature Ink Sublime - 50ml black-glass bottle with gold label, shown with a circular swatch of bright grassy green ink.

Sublime - 50ml

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$23.00

$18.40

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Robert Oster Signature Ink Sublime - 50ml black-glass bottle with gold label, shown with a circular swatch of bright grassy green ink.

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Sublime - 50ml

$23.00 $18.40

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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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Sale

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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Sale

Flaming Blue - 2ml

$1.70 $1.36

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Robert Oster Yellow Sunrise - 50ml Bottled Ink

Yellow Sunrise - 50ml

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$23.00

$18.40

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Robert Oster Yellow Sunrise - 50ml Bottled Ink

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Yellow Sunrise - 50ml

$23.00 $18.40

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Burned Orange - 50ml Robert Oster Signature fountain-pen ink bottle beside a swatch of its coppery-brown hue, inspired by South Australia's natural palette.

Burned Orange - 50ml

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$23.00

$18.40

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Burned Orange - 50ml Robert Oster Signature fountain-pen ink bottle beside a swatch of its coppery-brown hue, inspired by South Australia's natural palette.

/ 1 / 2

Sale

Burned Orange - 50ml

$23.00 $18.40

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Robert Oster Signature ink bottle labeled Signature with a swatch of deep purple color, 50ml size, inspired by South Australia's palette.

Deep Purple - 50ml

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$23.00

$18.40

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Robert Oster Signature ink bottle labeled Signature with a swatch of deep purple color, 50ml size, inspired by South Australia's palette.

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Deep Purple - 50ml

$23.00 $18.40

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Bottle of Robert Oster Signature fountain-pen ink, Eucalyptus Leaf - 50ml, with a dark green/black ink swatch in the upper right corner.

Eucalyptus Leaf - 50ml

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$23.00

$18.40

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Bottle of Robert Oster Signature fountain-pen ink, Eucalyptus Leaf - 50ml, with a dark green/black ink swatch in the upper right corner.

/ 1 / 2

Sale

Eucalyptus Leaf - 50ml

$23.00 $18.40

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Bottle of Robert Oster Signature Ink, Black Violet - 50ml, featuring a dark violet/blue hue inset, inspired by South Australia's wine regions.

Black Violet - 50ml

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$23.00

$18.40

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Bottle of Robert Oster Signature Ink, Black Violet - 50ml, featuring a dark violet/blue hue inset, inspired by South Australia's wine regions.

/ 1 / 2

Sale

Black Violet - 50ml

$23.00 $18.40

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Robert Oster Signature Fountain Pen Ink in Fire Engine Red, 50ml bottle, features a gold label and a bright red ink swatch.

Fire Engine Red - 50ml

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$23.00

$18.40

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Robert Oster Signature Fountain Pen Ink in Fire Engine Red, 50ml bottle, features a gold label and a bright red ink swatch.

Sale

Fire Engine Red - 50ml

$23.00 $18.40

More Details →

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

$18.40

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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.

/ 1 / 2

Sale

Australian Sky Blue - 50ml

$23.00 $18.40

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Barossa Grape - 50ml Robert Oster Signature ink bottle with gold-foil label, showcasing its distinctive dark purple sheen in the upper right.

Barossa Grape - 50ml

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$23.00

$18.40

X

Barossa Grape - 50ml Robert Oster Signature ink bottle with gold-foil label, showcasing its distinctive dark purple sheen in the upper right.

Sale

Barossa Grape - 50ml

$23.00 $18.40

More Details →

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

/ 1 / 2

Sale

Ten Dollar Blue - 2ml

$1.70 $1.36

More Details →

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

/ 1 / 2

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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 Australis Tea - 50ml Bottled Ink

Australis Tea - 50ml

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$23.00

$18.40

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Robert Oster Australis Tea - 50ml Bottled Ink

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Australis Tea - 50ml

$23.00 $18.40

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Robert Oster Australis Oak - 50ml Bottled Ink

Australis Oak - 50ml

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$23.00

$18.40

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Robert Oster Australis Oak - 50ml Bottled Ink

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Australis Oak - 50ml

$23.00 $18.40

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Robert Oster Melon Tea - 50ml Bottled Ink

Melon Tea - 50ml

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$23.00

$18.40

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Robert Oster Melon Tea - 50ml Bottled Ink

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Melon Tea - 50ml

$23.00 $18.40

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Robert Oster Blood Crimson - 50ml Bottled Ink

Blood Crimson - 50ml

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$23.00

$18.40

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Robert Oster Blood Crimson - 50ml Bottled Ink

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Blood Crimson - 50ml

$23.00 $18.40

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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

$18.40

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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.

/ 1 / 2

Sale

Carbon Fire - 50ml

$23.00 $18.40

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