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

Robert Oster

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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.
Robert Oster
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

Robert Oster

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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.
Robert Oster
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

Robert Oster

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Midnight Sapphire - 2ml ink sample featuring a dark blue–purple, granulating swatch on a white background, branded faintly with THE DESK BANDIT.
Robert Oster
Midnight Sapphire - 2ml
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$1.70
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Midnight Sapphire - 2ml ink sample featuring a dark blue–purple, granulating swatch on a white background, branded faintly with THE DESK BANDIT.

Midnight Sapphire - 2ml

$1.70

Robert Oster

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Charcoal - 2ml ink sample, deep blue-purple swatch with subtle shading, branded THE DESK BANDIT, representing Robert Oster's dye-based fountain-pen ink.
Robert Oster
Charcoal - 2ml
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$1.70
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Charcoal - 2ml ink sample, deep blue-purple swatch with subtle shading, branded THE DESK BANDIT, representing Robert Oster's dye-based fountain-pen ink.

Charcoal - 2ml

$1.70

Robert Oster

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Robert Oster Blood Moon - 2ml Ink Sample
Robert Oster
Blood Moon - 2ml
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$1.70
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Robert Oster Blood Moon - 2ml Ink Sample
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Blood Moon - 2ml

$1.70

Robert Oster

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Robert Oster Chicago - 2ml Ink Sample
Robert Oster
Chicago - 2ml
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$1.70
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Robert Oster Chicago - 2ml Ink Sample
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Chicago - 2ml

$1.70

Robert Oster

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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.
Robert Oster
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.
/ 1 / 2

Tokyo Blue Denim - 2ml

$1.70

Robert Oster

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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.
Robert Oster
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

Robert Oster

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Chocolate - 2ml ink sample by Robert Oster, depicted as a stylized dark burgundy-red ink blot with The Desk Bandit logo on a white background.
Robert Oster
Chocolate - 2ml
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$1.70
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Chocolate - 2ml ink sample by Robert Oster, depicted as a stylized dark burgundy-red ink blot with The Desk Bandit logo on a white background.

Chocolate - 2ml

$1.70

Robert Oster

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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.
Robert Oster
Graphite - 2ml
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$1.70
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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

$1.70

Robert Oster

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Robert Oster Whiskey - 2ml Ink Sample
Robert Oster
Whiskey - 2ml
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$1.70
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Robert Oster Whiskey - 2ml Ink Sample
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Whiskey - 2ml

$1.70

Robert Oster

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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.
Robert Oster
Vine Leaf - 2ml
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$1.70
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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.
/ 1 / 2

Vine Leaf - 2ml

$1.70

Robert Oster

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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.
Robert Oster
Velvet Crush (50ml)
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$23.00
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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

Robert Oster

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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.
Robert Oster
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

Robert Oster

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Robert Oster Pink Squirrel - 2ml Ink Sample
Robert Oster
Pink Squirrel - 2ml
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$1.70
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Robert Oster Pink Squirrel - 2ml Ink Sample
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Pink Squirrel - 2ml

$1.70

Robert Oster

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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.
Robert Oster
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.
/ 1 / 2

Bass Straight - 2ml

$1.70

Robert Oster

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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.
Robert Oster
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

Robert Oster

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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.
Robert Oster
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

Robert Oster

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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.
Robert Oster
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

Robert Oster

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Robert Oster No Fixed Address (Shake 'N' Shimmy) - 2ml Ink Sample
Robert Oster
No Fixed Address (Shake 'N' Shimmy) - 2ml
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$2.00
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Robert Oster No Fixed Address (Shake 'N' Shimmy) - 2ml Ink Sample
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No Fixed Address (Shake 'N' Shimmy) - 2ml

$2.00

Robert Oster

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Robert Oster Australian Opal Blue - 2ml Ink Sample
Robert Oster
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

Robert Oster

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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.
Robert Oster
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

Robert Oster

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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.
Robert Oster
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

Robert Oster

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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.
Robert Oster
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

Robert Oster

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Robert Oster Australis Rose - 50ml Bottled Ink
Robert Oster
Australis Rose - 50ml
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$23.00
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Robert Oster Australis Rose - 50ml Bottled Ink
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Australis Rose - 50ml

$23.00

Robert Oster

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Robert Oster's Pinky - 2ml ink sample, shown as a hand-brushed red swatch on white, featuring The Desk Bandit logo below.
Robert Oster
Pinky - 2ml
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$1.70
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Robert Oster's Pinky - 2ml ink sample, shown as a hand-brushed red swatch on white, featuring The Desk Bandit logo below.

Pinky - 2ml

$1.70

Robert Oster

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Robert Oster Tinseltown (Shake 'N' Shimmy) - 2ml Ink Sample
Robert Oster
Tinseltown (Shake 'N' Shimmy) - 2ml
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$2.00
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Robert Oster Tinseltown (Shake 'N' Shimmy) - 2ml Ink Sample
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Tinseltown (Shake 'N' Shimmy) - 2ml

$2.00

Robert Oster

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Robert Oster Mystic Storm - 2ml Ink Sample
Robert Oster
Mystic Storm - 2ml
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$1.70
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Robert Oster Mystic Storm - 2ml Ink Sample
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Mystic Storm - 2ml

$1.70

Robert Oster

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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.
Robert Oster
Marrone Mustard - 2ml
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$1.70
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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

$1.70

Robert Oster

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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.
Robert Oster
Blue Sea - 2ml
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$1.70
X
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

Robert Oster

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Robert Oster Muddy Sand - 2ml Ink Sample
Robert Oster
Muddy Sand - 2ml
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$1.70
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Robert Oster Muddy Sand - 2ml Ink Sample
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Muddy Sand - 2ml

$1.70

Robert Oster

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Robert Oster Muddy Crown - 2ml Ink Sample
Robert Oster
Muddy Crown - 2ml
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$1.70
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Robert Oster Muddy Crown - 2ml Ink Sample
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Muddy Crown - 2ml

$1.70

Robert Oster

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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.
Robert Oster
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

Robert Oster

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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.
Robert Oster
Deep Sea - 50ml
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$23.00
X
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

Robert Oster

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Lipstick Red - 2ml ink sample featuring a burgundy-red blot with darker edges by Robert Oster, logo THE DESK BANDIT at the bottom.
Robert Oster
Lipstick Red - 2ml
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$1.70
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Lipstick Red - 2ml ink sample featuring a burgundy-red blot with darker edges by Robert Oster, logo THE DESK BANDIT at the bottom.

Lipstick Red - 2ml

$1.70

Robert Oster

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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.
Robert Oster
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

Robert Oster

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Robert Oster Jewel in the Crown (Shake 'N' Shimmy) - 2ml Ink Sample
Robert Oster
Jewel in the Crown (Shake 'N' Shimmy) - 2ml
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$2.00
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Robert Oster Jewel in the Crown (Shake 'N' Shimmy) - 2ml Ink Sample
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Jewel in the Crown (Shake 'N' Shimmy) - 2ml

$2.00

Robert Oster

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Robert Oster Muddy Grass - 2ml Ink Sample
Robert Oster
Muddy Grass - 2ml
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$1.70
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Robert Oster Muddy Grass - 2ml Ink Sample
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Muddy Grass - 2ml

$1.70

Robert Oster

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Robert Oster Citrus - 2ml Ink Sample
Robert Oster
Citrus - 2ml
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$1.70
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Robert Oster Citrus - 2ml Ink Sample
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Citrus - 2ml

$1.70

Robert Oster

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