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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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Green Green - 2ml ink sample by Robert Oster on white paper with darker shading, showcasing The Desk Bandit watermark.

Green Green - 2ml

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$1.70

$1.36

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Green Green - 2ml ink sample by Robert Oster on white paper with darker shading, showcasing The Desk Bandit watermark.

Sale

Green Green - 2ml

$1.70 $1.36

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Swatch of Robert Oster's Copper - 2ml ink, displaying rich shading and pooling effects, with faint THE DESK BANDIT branding on white paper.

Copper - 2ml

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$1.70

$1.36

X

Swatch of Robert Oster's Copper - 2ml ink, displaying rich shading and pooling effects, with faint THE DESK BANDIT branding on white paper.

Sale

Copper - 2ml

$1.70 $1.36

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Bronze - 2ml ink sample: An abstract vertical blot in deep brown/near-black with subtle tonal variations, featuring The Desk Bandit watermark, representing Robert Oster's dye-based ink.

Bronze - 2ml

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$1.70

$1.36

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Bronze - 2ml ink sample: An abstract vertical blot in deep brown/near-black with subtle tonal variations, featuring The Desk Bandit watermark, representing Robert Oster's dye-based ink.

Sale

Bronze - 2ml

$1.70 $1.36

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Light Green - 2ml

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$1.70

$1.36

X

Sale

Light Green - 2ml

$1.70 $1.36

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Spearmint - 2ml ink sample by Robert Oster, showing dark teal-green hue with pooling edges and subtle center shading, from The Desk Bandit's review.

Spearmint - 2ml

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$1.70

$1.36

X

Spearmint - 2ml ink sample by Robert Oster, showing dark teal-green hue with pooling edges and subtle center shading, from The Desk Bandit's review.

Sale

Spearmint - 2ml

$1.70 $1.36

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Green Olive - 2ml ink swatch on paper, showing warm golden-brown tones with sepia feathering, featuring THE DESK BANDIT watermark, indicating an ink sample.

Green Olive - 2ml

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$1.70

$1.36

X

Green Olive - 2ml ink swatch on paper, showing warm golden-brown tones with sepia feathering, featuring THE DESK BANDIT watermark, indicating an ink sample.

Sale

Green Olive - 2ml

$1.70 $1.36

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Robert Oster Bondi Blue - 2ml ink sample swatch on white paper, showcasing a deep blue hue with purplish sheen, from The Desk Bandit.

Bondi Blue - 2ml

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$1.70

$1.36

X

Robert Oster Bondi Blue - 2ml ink sample swatch on white paper, showcasing a deep blue hue with purplish sheen, from The Desk Bandit.

Sale

Bondi Blue - 2ml

$1.70 $1.36

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Robert Oster Choc Pudding - 2ml Ink Sample

Choc Pudding - 2ml

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$1.70

$1.36

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Robert Oster Choc Pudding - 2ml Ink Sample

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Choc Pudding - 2ml

$1.70 $1.36

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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

$1.36

X

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

Sale

Grun Schwarz - 2ml

$1.70 $1.36

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Close-up of a dark brown ink swatch labeled The Desk Bandit, showcasing the Robert Oster Golden Brown - 2ml fountain pen ink sample on white paper.

Golden Brown - 2ml

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$1.70

$1.36

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Close-up of a dark brown ink swatch labeled The Desk Bandit, showcasing the Robert Oster Golden Brown - 2ml fountain pen ink sample on white paper.

Sale

Golden Brown - 2ml

$1.70 $1.36

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Robert Oster Signature Ink, Sydney Darling Harbour, 50ml bottle with ink color swatch, showcasing sustainable, non-toxic fountain pen ink made in Australia.

Sydney Darling Harbour - 50ml

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$23.00

$18.40

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Robert Oster Signature Ink, Sydney Darling Harbour, 50ml bottle with ink color swatch, showcasing sustainable, non-toxic fountain pen ink made in Australia.

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Sale

Sydney Darling Harbour - 50ml

$23.00 $18.40

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Tangerine - 2ml

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$1.70

$1.36

X

Sale

Tangerine - 2ml

$1.70 $1.36

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Robert Oster Orange Rumble - 2ml Ink Samples

Orange Rumble - 2ml

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$1.70

$1.36

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Robert Oster Orange Rumble - 2ml Ink Samples

Sale

Orange Rumble - 2ml

$1.70 $1.36

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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

$1.36

X

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.

Sale

Ryde Green - 2ml

$1.70 $1.36

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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

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$1.70

$1.36

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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.

Sale

Blue Night - 2ml

$1.70 $1.36

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Wind - 2ml

Wind - 2ml

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$1.70

$1.36

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Wind - 2ml

/ 1 / 2

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Wind - 2ml

$1.70 $1.36

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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

$1.36

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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

Sale

True Blue - 2ml

$1.70 $1.36

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Bottle of Robert Oster Signature ink titled Grey Seas - 50ml, features a gold label and deep blue swatch, showcasing its unique Australian-inspired color.

Grey Seas - 50ml

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$23.00

$18.40

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Bottle of Robert Oster Signature ink titled Grey Seas - 50ml, features a gold label and deep blue swatch, showcasing its unique Australian-inspired color.

/ 1 / 2

Sale

Grey Seas - 50ml

$23.00 $18.40

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Robert Oster Muddy Swamp - 2ml Ink Sample

Muddy Swamp - 2ml

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$1.70

$1.36

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Robert Oster Muddy Swamp - 2ml Ink Sample

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Muddy Swamp - 2ml

$1.70 $1.36

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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

$1.36

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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

Sale

Deep Purple - 2ml

$1.70 $1.36

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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

$1.36

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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.

/ 1 / 2

Sale

Red Candy - 2ml

$1.70 $1.36

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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

$1.36

X

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.

Sale

School Blue - 2ml

$1.70 $1.36

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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

$1.36

X

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

Sale

Purple Jazz - 2ml

$1.70 $1.36

More Details →

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

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$1.70

$1.36

X

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

Sale

Midnight Sapphire - 2ml

$1.70 $1.36

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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

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$1.70

$1.36

X

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

Sale

Charcoal - 2ml

$1.70 $1.36

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Robert Oster Blood Moon - 2ml Ink Sample

Blood Moon - 2ml

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$1.70

$1.36

X

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.

/ 1 / 2

Sale

Tokyo Blue Denim - 2ml

$1.70 $1.36

More Details →

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

X

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

More Details →

Chocolate - 2ml

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$1.70

$1.36

X

Sale

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

X

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

More Details →

Robert Oster Whiskey - 2ml Ink Sample

Whiskey - 2ml

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$1.70

$1.36

X

Robert Oster Whiskey - 2ml Ink Sample

/ 1 / 2

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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

X

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

/ 1 / 2

Sale

Vine Leaf - 2ml

$1.70 $1.36

More Details →

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.

/ 1 / 2

Sale

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

X

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.

/ 1 / 2

Sale

Carbon Fire - 2ml

$1.70 $1.36

More Details →

Robert Oster Pink Squirrel - 2ml Ink Sample

Pink Squirrel - 2ml

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$1.70

$1.36

X

Robert Oster Pink Squirrel - 2ml Ink Sample

/ 1 / 2

Sale

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

X

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

Sale

Bass Straight - 2ml

$1.70 $1.36

More Details →

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

X

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.

/ 1 / 2

Sale

Thunderstorm - 50ml

$23.00 $18.40

More Details →

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

X

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

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

$1.36

X

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

More Details →

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