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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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Grun Schwarz - 2ml ink sample by Robert Oster, featuring a dark hue with burgundy undertones, displayed as a swatch with The Desk Bandit watermark.

Grun Schwarz - 2ml

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$1.70

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Grun Schwarz - 2ml ink sample by Robert Oster, featuring a dark hue with burgundy undertones, displayed as a swatch with The Desk Bandit watermark.

Grun Schwarz - 2ml

$1.70

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Ink swatch of Purple Jazz - 2ml by Robert Oster, featuring a deep blue-purple hue on white, with The Desk Bandit watermark visible.

Purple Jazz - 2ml

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$1.70

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Ink swatch of Purple Jazz - 2ml by Robert Oster, featuring a deep blue-purple hue on white, with The Desk Bandit watermark visible.

Purple Jazz - 2ml

$1.70

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Sushi - 2ml ink sample: A deep red, watercolor-like swatch with soft edges, showcasing the vibrant hue of Robert Oster's fountain pen ink.

Sushi - 2ml

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$1.70

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Sushi - 2ml ink sample: A deep red, watercolor-like swatch with soft edges, showcasing the vibrant hue of Robert Oster's fountain pen ink.

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Sushi - 2ml

$1.70

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Robert Oster Taiwan Blue - 2ml Ink Sample

Taiwan Blue - 2ml

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$1.70

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Robert Oster Taiwan Blue - 2ml Ink Sample

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Taiwan Blue - 2ml

$1.70

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Deep Purple - 2ml ink sample, showing a dark blue-violet swatch with a goldish-brown sheen, reflecting Robert Oster's unique Australian-inspired palette.

Deep Purple - 2ml

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$1.70

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Deep Purple - 2ml ink sample, showing a dark blue-violet swatch with a goldish-brown sheen, reflecting Robert Oster's unique Australian-inspired palette.

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Deep Purple - 2ml

$1.70

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True Blue - 2ml ink sample by Robert Oster, featuring a deep blue watercolor swatch with a cloud-like texture and reddish-purple edges, reflecting Australian inspiration.

True Blue - 2ml

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$1.70

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True Blue - 2ml ink sample by Robert Oster, featuring a deep blue watercolor swatch with a cloud-like texture and reddish-purple edges, reflecting Australian inspiration.

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True Blue - 2ml

$1.70

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Ryde Green - 2ml ink sample by Robert Oster, featuring an abstract green splash on white, with a faint The Desk Bandit watermark at the bottom.

Ryde Green - 2ml

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$1.70

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Ryde Green - 2ml ink sample by Robert Oster, featuring an abstract green splash on white, with a faint The Desk Bandit watermark at the bottom.

Ryde Green - 2ml

$1.70

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Abstract deep red pigment wash resembling a watercolor ink blot, representing Robert Oster's Red Candy - 2ml fountain pen ink sample.

Red Candy - 2ml

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$1.70

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Abstract deep red pigment wash resembling a watercolor ink blot, representing Robert Oster's Red Candy - 2ml fountain pen ink sample.

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Red Candy - 2ml

$1.70

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School Blue - 2ml ink sample by Robert Oster, featuring a deep blue abstract ink-blot with darker edges, showcased on a white background from The Desk Bandit.

School Blue - 2ml

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$1.70

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School Blue - 2ml ink sample by Robert Oster, featuring a deep blue abstract ink-blot with darker edges, showcased on a white background from The Desk Bandit.

School Blue - 2ml

$1.70

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Swatch of Robert Oster's Crimson - 2ml, showcasing pooling and shading effects on white paper, with The Desk Bandit watermark visible.

Crimson - 2ml

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$1.70

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Swatch of Robert Oster's Crimson - 2ml, showcasing pooling and shading effects on white paper, with The Desk Bandit watermark visible.

Crimson - 2ml

$1.70

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Gold Antiqua - 50ml bottle of Robert Oster Signature fountain-pen ink, featuring a rich, warm brown swatch highlighting its unique shading inspired by South Australia.

Gold Antiqua - 50ml

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$23.00

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Gold Antiqua - 50ml bottle of Robert Oster Signature fountain-pen ink, featuring a rich, warm brown swatch highlighting its unique shading inspired by South Australia.

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Gold Antiqua - 50ml

$23.00

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Blue watercolor swatch representing Robert Oster's Bass Straight ink sample, 2ml, on white background, showcasing its abstract wash style and dye-based composition.

Bass Straight - 2ml

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$1.70

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Blue watercolor swatch representing Robert Oster's Bass Straight ink sample, 2ml, on white background, showcasing its abstract wash style and dye-based composition.

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Bass Straight - 2ml

$1.70

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Carbon Fire - 2ml ink sample, showcasing a dark blue swatch with subtle shading and a reddish sheen, typical of Robert Oster's dye-based inks.

Carbon Fire - 2ml

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$1.70

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Carbon Fire - 2ml ink sample, showcasing a dark blue swatch with subtle shading and a reddish sheen, typical of Robert Oster's dye-based inks.

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Carbon Fire - 2ml

$1.70

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Robert Oster Signature fountain-pen ink bottle, labeled Thunderstorm - 50ml, featuring a gold label and a circular swatch of muted slate-blue color in the corner.

Thunderstorm - 50ml

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$23.00

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Robert Oster Signature fountain-pen ink bottle, labeled Thunderstorm - 50ml, featuring a gold label and a circular swatch of muted slate-blue color in the corner.

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Thunderstorm - 50ml

$23.00

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Robert Oster Australian Opal Blue - 2ml Ink Sample

Australian Opal Blue - 2ml

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$1.70

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Robert Oster Australian Opal Blue - 2ml Ink Sample

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Australian Opal Blue - 2ml

$1.70

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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

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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

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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

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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

$23.00

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Robert Oster Signature “Soda Pop Blue” ink, 50ml bottle with gold-foil label, showcases a vibrant blue color in the round inset on the label.

Soda Pop Blue - 50ml

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$23.00

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Robert Oster Signature “Soda Pop Blue” ink, 50ml bottle with gold-foil label, showcases a vibrant blue color in the round inset on the label.

Soda Pop Blue - 50ml

$23.00

More Details →

Abstract design preview for Robert Oster's Green At Night - 2ml ink sample, featuring an irregular dark form with lighter patches on a white background.

Green At Night - 2ml

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$1.70

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Abstract design preview for Robert Oster's Green At Night - 2ml ink sample, featuring an irregular dark form with lighter patches on a white background.

Green At Night - 2ml

$1.70

More Details →

Tokyo Blue Denim - 2ml ink sample, deep blue with reddish-brown sheen, on paper. Ideal for testing fountain pen ink color and flow.

Tokyo Blue Denim - 2ml

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$1.70

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Tokyo Blue Denim - 2ml ink sample, deep blue with reddish-brown sheen, on paper. Ideal for testing fountain pen ink color and flow.

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Tokyo Blue Denim - 2ml

$1.70

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River of Fire - 50ml bottle of Robert Oster Signature fountain-pen ink with a circular swatch displaying its deep teal hue and reddish sheen.

River of Fire - 50ml

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$23.00

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River of Fire - 50ml bottle of Robert Oster Signature fountain-pen ink with a circular swatch displaying its deep teal hue and reddish sheen.

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River of Fire - 50ml

$23.00

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Australis Rose - 50ml - The Desk Bandit

Australis Rose - 50ml

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$23.00

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Australis Rose - 50ml - The Desk Bandit

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Australis Rose - 50ml

$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.

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

More Details →

Lipstick Red - 2ml

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$1.70

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Lipstick Red - 2ml

$1.70

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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

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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

$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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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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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

X

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

More Details →

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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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

X

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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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

More Details →

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 →

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

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

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.

Royal Red - 2ml

$1.70

More Details →

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