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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 Blood Moon - 2ml Ink Sample

Blood Moon - 2ml

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$1.70

$1.36

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Robert Oster Blood Moon - 2ml Ink Sample

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Blood Moon - 2ml

$1.70 $1.36

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Robert Oster Chicago - 2ml Ink Sample

Chicago - 2ml

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$1.70

$1.36

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Robert Oster Chicago - 2ml Ink Sample

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Chicago - 2ml

$1.70 $1.36

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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.

Tokyo Blue Denim - 2ml

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$1.70

$1.36

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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 $1.36

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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

$1.36

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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.

Sale

Crimson - 2ml

$1.70 $1.36

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Chocolate - 2ml

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$1.70

$1.36

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Chocolate - 2ml

$1.70 $1.36

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Graphite - 2ml ink sample by Robert Oster, featuring deep, rich strokes with subtle undertones on a white background, ideal for fountain-pen enthusiasts.

Graphite - 2ml

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$1.70

$1.36

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Graphite - 2ml ink sample by Robert Oster, featuring deep, rich strokes with subtle undertones on a white background, ideal for fountain-pen enthusiasts.

Sale

Graphite - 2ml

$1.70 $1.36

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Robert Oster Whiskey - 2ml Ink Sample

Whiskey - 2ml

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$1.70

$1.36

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Robert Oster Whiskey - 2ml Ink Sample

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Whiskey - 2ml

$1.70 $1.36

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Vine Leaf - 2ml sample: Abstract green watercolor swatch represents the vibrant Robert Oster ink, showcasing subtle tonal variations for fountain pen enthusiasts.

Vine Leaf - 2ml

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$1.70

$1.36

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Vine Leaf - 2ml sample: Abstract green watercolor swatch represents the vibrant Robert Oster ink, showcasing subtle tonal variations for fountain pen enthusiasts.

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Vine Leaf - 2ml

$1.70 $1.36

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Robert Oster Signature Ink Velvet Crush (50ml) in a black vial with a gold label, showcasing rich purple ink with a gold-bronze sheen.

Velvet Crush (50ml)

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$23.00

$18.40

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Robert Oster Signature Ink Velvet Crush (50ml) in a black vial with a gold label, showcasing rich purple ink with a gold-bronze sheen.

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Velvet Crush (50ml)

$23.00 $18.40

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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

$1.36

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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 $1.36

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Robert Oster Pink Squirrel - 2ml Ink Sample

Pink Squirrel - 2ml

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$1.70

$1.36

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Robert Oster Pink Squirrel - 2ml Ink Sample

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Pink Squirrel - 2ml

$1.70 $1.36

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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

$1.36

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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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Sale

Bass Straight - 2ml

$1.70 $1.36

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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

$18.40

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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 $18.40

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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

$18.40

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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.

Sale

Soda Pop Blue - 50ml

$23.00 $18.40

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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

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$1.70

$1.36

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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.

Sale

Green At Night - 2ml

$1.70 $1.36

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Robert Oster Australian Opal Blue - 2ml Ink Sample

Australian Opal Blue - 2ml

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$1.70

$1.36

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Robert Oster Australian Opal Blue - 2ml Ink Sample

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Australian Opal Blue - 2ml

$1.70 $1.36

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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

$18.40

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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 $18.40

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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

$18.40

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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.

Sale

Cherry Blossom - 50ml

$23.00 $18.40

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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

$1.36

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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.

Sale

Lemon Grass - 2ml

$1.70 $1.36

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Robert Oster Australis Rose - 50ml Bottled Ink

Australis Rose - 50ml

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$23.00

$18.40

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Robert Oster Australis Rose - 50ml Bottled Ink

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Australis Rose - 50ml

$23.00 $18.40

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Pinky - 2ml

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$1.70

$1.36

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Sale

Pinky - 2ml

$1.70 $1.36

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Robert Oster Mystic Storm - 2ml Ink Sample

Mystic Storm - 2ml

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$1.70

$1.36

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Robert Oster Mystic Storm - 2ml Ink Sample

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Mystic Storm - 2ml

$1.70 $1.36

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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

$1.36

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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.

Sale

Marrone Mustard - 2ml

$1.70 $1.36

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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

$1.36

X

Blue Sea - 2ml ink sample by Robert Oster, showing deep blue with reddish-purple sheen on white paper, featuring The Desk Bandit watermark.

Sale

Blue Sea - 2ml

$1.70 $1.36

More Details →

Robert Oster Muddy Sand - 2ml Ink Sample

Muddy Sand - 2ml

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$1.70

$1.36

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Robert Oster Muddy Sand - 2ml Ink Sample

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Muddy Sand - 2ml

$1.70 $1.36

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Robert Oster Muddy Crown - 2ml Ink Sample

Muddy Crown - 2ml

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$1.70

$1.36

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Robert Oster Muddy Crown - 2ml Ink Sample

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Muddy Crown - 2ml

$1.70 $1.36

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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

$18.40

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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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Sale

Honey Bee - 50ml

$23.00 $18.40

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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

$18.40

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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.

Sale

Deep Sea - 50ml

$23.00 $18.40

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Lipstick Red - 2ml

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$1.70

$1.36

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Sale

Lipstick Red - 2ml

$1.70 $1.36

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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

$1.36

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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.

Sale

Blue Lagoon - 2ml

$1.70 $1.36

More Details →

Robert Oster Muddy Grass - 2ml Ink Sample

Muddy Grass - 2ml

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$1.70

$1.36

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Robert Oster Muddy Grass - 2ml Ink Sample

/ 1 / 2

Sale

Muddy Grass - 2ml

$1.70 $1.36

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Robert Oster Citrus - 2ml Ink Sample

Citrus - 2ml

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$1.70

$1.36

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Robert Oster Citrus - 2ml Ink Sample

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Citrus - 2ml

$1.70 $1.36

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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

$18.40

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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.

/ 1 / 2

Sale

Velvet Storm - 50ml

$23.00 $18.40

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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

$18.40

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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.

Sale

Morning Mist - 50ml

$23.00 $18.40

More Details →

Abstract wash of bright red-orange watercolor on white background, highlighting Robert Oster's Orange - 2ml ink sample, with faint THE DESK BANDIT watermark at the bottom.

Orange - 2ml

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$1.70

$1.36

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Abstract wash of bright red-orange watercolor on white background, highlighting Robert Oster's Orange - 2ml ink sample, with faint THE DESK BANDIT watermark at the bottom.

Sold Out

Orange - 2ml

$1.70 $1.36

This product is sold out

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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

$18.40

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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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Sold Out

River of Fire - 50ml

$23.00 $18.40

This product is sold out

More Details →

Robert Oster Cosmic Swirl - 50ml Bottled Ink

Cosmic Swirl - 50ml

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$23.00

$18.40

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Robert Oster Cosmic Swirl - 50ml Bottled Ink

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Sold Out

Cosmic Swirl - 50ml

$23.00 $18.40

This product is sold out

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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

$18.40

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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.

/ 1 / 2

Sold Out

Dragon's Night - 50ml

$23.00 $18.40

This product is sold out

More Details →

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

$18.40

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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.

/ 1 / 2

Sold Out

Toffee - 50ml

$23.00 $18.40

This product is sold out

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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

$18.40

X

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

Sold Out

NG Special '16 - 50ml

$23.00 $18.40

This product is sold out

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