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.
Robert Oster
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

Robert Oster

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Swatch of Robert Oster's Blue Night ink, 2ml sample, displayed as a dark navy watercolor stroke on white, with The Desk Bandit watermark below.
Robert Oster
Blue Night - 2ml
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$1.70
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Swatch of Robert Oster's Blue Night ink, 2ml sample, displayed as a dark navy watercolor stroke on white, with The Desk Bandit watermark below.

Blue Night - 2ml

$1.70

Robert Oster

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Robert Oster Aussie Liquid Gold (Shake 'N' Shimmy) - 2ml Ink Sample
Robert Oster
Aussie Liquid Gold (Shake 'N' Shimmy) - 2ml
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$2.00
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Robert Oster Aussie Liquid Gold (Shake 'N' Shimmy) - 2ml Ink Sample
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Aussie Liquid Gold (Shake 'N' Shimmy) - 2ml

$2.00

Robert Oster

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

$2.00

Robert Oster

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Tangerine - 2ml ink sample by Robert Oster, featuring an abstract orange watercolor wash with THE DESK BANDIT wordmark at the bottom.
Robert Oster
Tangerine - 2ml
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$1.70
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Tangerine - 2ml ink sample by Robert Oster, featuring an abstract orange watercolor wash with THE DESK BANDIT wordmark at the bottom.

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

Robert Oster

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Robert Oster Taiwan Blue - 2ml Ink Sample
Robert Oster
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

Robert Oster

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Sterling Silver (Shake 'N' Shimmy) - 2ml ink sample with near-black hue, metallic shimmer, and brushed texture, ideal for testing color and flow.
Robert Oster
Sterling Silver (Shake 'N' Shimmy) - 2ml
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$2.00
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Sterling Silver (Shake 'N' Shimmy) - 2ml ink sample with near-black hue, metallic shimmer, and brushed texture, ideal for testing color and flow.
/ 1 / 2

Sterling Silver (Shake 'N' Shimmy) - 2ml

$2.00

Robert Oster

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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.
Robert Oster
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.
/ 1 / 2

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.
Robert Oster
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.
/ 1 / 2

True Blue - 2ml

$1.70

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Terracotta - 2ml ink sample by Robert Oster, showcased as a bright reddish-orange abstract swatch on a white background, featuring The Desk Bandit watermark.
Robert Oster
Terracotta - 2ml
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$1.70
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Terracotta - 2ml ink sample by Robert Oster, showcased as a bright reddish-orange abstract swatch on a white background, featuring The Desk Bandit watermark.

Terracotta - 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.
Robert Oster
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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Orange Zest - 2ml ink sample by Robert Oster, featuring a bright red-orange brushstroke with varied pigment density on a textured white background.
Robert Oster
Orange Zest - 2ml
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$1.70
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Orange Zest - 2ml ink sample by Robert Oster, featuring a bright red-orange brushstroke with varied pigment density on a textured white background.

Orange Zest - 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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Blood Moon - 2ml
Robert Oster
Blood Moon - 2ml
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$1.70
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Blood Moon - 2ml
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Blood Moon - 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.
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

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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

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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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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

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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.
Robert Oster
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

Robert Oster

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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.
Robert Oster
Orange - 2ml
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$1.70
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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.

Orange - 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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Wind - 2ml
Robert Oster
Wind - 2ml
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$1.70
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Wind - 2ml
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Wind - 2ml

$1.70

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Muddy Swamp - 2ml
Robert Oster
Muddy Swamp - 2ml
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$1.70
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Muddy Swamp - 2ml
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Muddy Swamp - 2ml

$1.70

Robert Oster

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

$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.
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.
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Bass Straight - 2ml

$1.70

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

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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

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Pink Squirrel - 2ml
Robert Oster
Pink Squirrel - 2ml
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$1.70
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Pink Squirrel - 2ml
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Pink Squirrel - 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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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.
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Vine Leaf - 2ml

$1.70

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 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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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

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

$1.70

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