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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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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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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

X

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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Sale

Whisper Red - 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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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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Sale

Frankly Scarlet - 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

X

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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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

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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

X

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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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

X

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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Fizzy Lime (Shake 'N' Shimmy) - 2ml sample of Robert Oster fountain pen ink, featuring an abstract green swatch with silvery highlights on a white background.

Fizzy Lime (Shake 'N' Shimmy) - 2ml

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$2.00

$1.60

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Fizzy Lime (Shake 'N' Shimmy) - 2ml sample of Robert Oster fountain pen ink, featuring an abstract green swatch with silvery highlights on a white background.

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Sale

Fizzy Lime (Shake 'N' Shimmy) - 2ml

$2.00 $1.60

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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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Sale

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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Sale

Plumb Nut - 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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Sale

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

X

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.

/ 1 / 2

Sale

Great Southern Ocean - 50ml

$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.

Motor Oil - 50ml

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$23.00

$18.40

X

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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Sale

Bondi Blue - 50ml

$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.

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.

/ 1 / 2

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

X

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

/ 1 / 2

Sale

Sublime - 50ml

$23.00 $18.40

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Robert Oster Glistening Orange Rumble (Shake 'N' Shimmy) - 2ml Ink Sample

Glistening Orange Rumble (Shake 'N' Shimmy) - 2ml

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$2.00

$1.60

X

Robert Oster Glistening Orange Rumble (Shake 'N' Shimmy) - 2ml Ink Sample

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Sale

Glistening Orange Rumble (Shake 'N' Shimmy) - 2ml

$2.00 $1.60

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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

X

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

/ 1 / 2

Sale

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

X

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

X

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

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Robert Oster Australis Tea - 50ml Bottled Ink

Australis Tea - 50ml

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$23.00

$18.40

X

Robert Oster Australis Tea - 50ml Bottled Ink

/ 1 / 2

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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

X

Robert Oster Australis Oak - 50ml Bottled Ink

/ 1 / 2

Sale

Australis Oak - 50ml

$23.00 $18.40

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Robert Oster Flaming Blue - 2ml Ink Sample

Flaming Blue - 2ml

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$1.70

$1.36

X

Robert Oster Flaming Blue - 2ml Ink Sample

/ 1 / 2

Sale

Flaming Blue - 2ml

$1.70 $1.36

More Details →

Robert Oster Melon Tea - 50ml Bottled Ink

Melon Tea - 50ml

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$23.00

$18.40

X

Robert Oster Melon Tea - 50ml Bottled Ink

/ 1 / 2

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Melon Tea - 50ml

$23.00 $18.40

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Robert Oster Yellow Sunrise - 50ml Bottled Ink

Yellow Sunrise - 50ml

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$23.00

$18.40

X

Robert Oster Yellow Sunrise - 50ml Bottled Ink

/ 1 / 2

Sale

Yellow Sunrise - 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

X

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

More Details →

Robert Oster Signature ink bottle labeled Avocado - 50ml with a gold label, featuring a swatch of the ink color on the black plastic bottle.

Avocado - 50ml

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$23.00

$18.40

X

Robert Oster Signature ink bottle labeled Avocado - 50ml with a gold label, featuring a swatch of the ink color on the black plastic bottle.

/ 1 / 2 / 3

Sale

Avocado - 50ml

$23.00 $18.40

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Robert Oster Signature Ink Marine - 50ml bottle with gold label, black cap, and visible teal swatch showcasing the unique dye-based ink.

Marine - 50ml

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$23.00

$18.40

X

Robert Oster Signature Ink Marine - 50ml bottle with gold label, black cap, and visible teal swatch showcasing the unique dye-based ink.

Sale

Marine - 50ml

$23.00 $18.40

More Details →

Peach - 50ml Robert Oster Signature fountain-pen ink bottle with a bright, warm orange swatch circle, inspired by South Australia's wine regions.

Peach - 50ml

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$23.00

$18.40

X

Peach - 50ml Robert Oster Signature fountain-pen ink bottle with a bright, warm orange swatch circle, inspired by South Australia's wine regions.

/ 1 / 2

Sold Out

Peach - 50ml

$23.00 $18.40

This product is sold out

More Details →

Hot Pink - 50ml Robert Oster Signature fountain pen ink bottle with a circular swatch, showcasing a vibrant shade inspired by South Australia's palette.

Hot Pink - 50ml

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$23.00

$18.40

X

Hot Pink - 50ml Robert Oster Signature fountain pen ink bottle with a circular swatch, showcasing a vibrant shade inspired by South Australia's palette.

/ 1 / 2

Sold Out

Hot Pink - 50ml

$23.00 $18.40

This product is sold out

More Details →

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

$18.40

X

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.

/ 1 / 2

Sold Out

True Blue - 50ml

$23.00 $18.40

This product is sold out

More Details →

Robert Oster Signature fountain-pen ink, Direct Sun - 50ml, with a swatch showcasing its rich red hue, inspired by South Australia's wine regions.

Direct Sun - 50ml

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$23.00

$18.40

X

Robert Oster Signature fountain-pen ink, Direct Sun - 50ml, with a swatch showcasing its rich red hue, inspired by South Australia's wine regions.

Sold Out

Direct Sun - 50ml

$23.00 $18.40

This product is sold out

More Details →

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