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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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Avocado - 2ml ink sample shows a textured, organic wash of mottled, dark greenish-brown, resembling weathered patina, on a white background.

Avocado - 2ml

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$1.70

$1.36

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Avocado - 2ml ink sample shows a textured, organic wash of mottled, dark greenish-brown, resembling weathered patina, on a white background.

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Avocado - 2ml

$1.70 $1.36

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Robert Oster Peppermint ink swatch shows deep teal with a purple sheen, from Desk Bandit blog. Sample size: 2ml, dye-based.

Peppermint - 2ml

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$1.70

$1.36

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Robert Oster Peppermint ink swatch shows deep teal with a purple sheen, from Desk Bandit blog. Sample size: 2ml, dye-based.

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Peppermint - 2ml

$1.70 $1.36

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Robert Oster Sublime - 2ml Ink Samples

Sublime - 2ml

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$1.70

$1.36

X

Robert Oster Sublime - 2ml Ink Samples

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Sublime - 2ml

$1.70 $1.36

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Opal Green - 2ml ink sample by Robert Oster, showing a textured green watercolor swatch with varied tone on a white background.

Opal Green - 2ml

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$1.70

$1.36

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Opal Green - 2ml ink sample by Robert Oster, showing a textured green watercolor swatch with varied tone on a white background.

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Opal Green - 2ml

$1.70 $1.36

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Moss - 2ml ink sample by Robert Oster, featuring a dark olive-green swatch on white, labeled with The Desk Bandit watermark.

Moss - 2ml

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$1.70

$1.36

X

Moss - 2ml ink sample by Robert Oster, featuring a dark olive-green swatch on white, labeled with The Desk Bandit watermark.

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Moss - 2ml

$1.70 $1.36

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Emerald - 2ml ink sample by Robert Oster, showcasing a dark green swatch with subtle shading and sheen, featuring The Desk Bandit watermark.

Emerald - 2ml

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$1.70

$1.36

X

Emerald - 2ml ink sample by Robert Oster, showcasing a dark green swatch with subtle shading and sheen, featuring The Desk Bandit watermark.

Sale

Emerald - 2ml

$1.70 $1.36

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Crocodile Green - 2ml ink sample showcases a moss-green watercolor swatch with emerald and teal shading, plus a rusty brown sheen along edges.

Crocodile Green - 2ml

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$1.70

$1.36

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Crocodile Green - 2ml ink sample showcases a moss-green watercolor swatch with emerald and teal shading, plus a rusty brown sheen along edges.

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Crocodile Green - 2ml

$1.70 $1.36

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Robert Oster Chartreuse - 2ml Ink Sample

Chartreuse - 2ml

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$1.70

$1.36

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Robert Oster Chartreuse - 2ml Ink Sample

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Chartreuse - 2ml

$1.70 $1.36

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Verde de Rio - 2ml ink sample by Robert Oster, featuring a bright yellow-green abstract swatch with dark shading, showcasing its unique dye-based color.

Verde de Rio - 2ml

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$1.70

$1.36

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Verde de Rio - 2ml ink sample by Robert Oster, featuring a bright yellow-green abstract swatch with dark shading, showcasing its unique dye-based color.

Sale

Verde de Rio - 2ml

$1.70 $1.36

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Forest Green - 2ml ink sample: A deep, forest-green swatch with a dark sheen effect, featuring a THE DESK BANDIT watermark, representing Robert Oster's dye-based ink.

Forest Green - 2ml

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$1.70

$1.36

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Forest Green - 2ml ink sample: A deep, forest-green swatch with a dark sheen effect, featuring a THE DESK BANDIT watermark, representing Robert Oster's dye-based ink.

Sale

Forest Green - 2ml

$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.

Green Green - 2ml

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$1.70

$1.36

X

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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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

More Details →

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

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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.

Sale

Grun Schwarz - 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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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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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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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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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

$1.36

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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.

Sale

Green Lime - 2ml

$1.70 $1.36

More Details →

Ever Green - 2ml ink sample, deep green with dark sheen, displayed as an abstract swatch on paper, from The Desk Bandit's fountain-pen ink collection.

Ever Green - 2ml

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$1.70

$1.36

X

Ever Green - 2ml ink sample, deep green with dark sheen, displayed as an abstract swatch on paper, from The Desk Bandit's fountain-pen ink collection.

Sale

Ever Green - 2ml

$1.70 $1.36

More Details →

Robert Oster Khakhi - 50ml ink bottle with black cap and gold seal, featuring a grayish base swatch with warm gold sheen.

Khakhi - 50ml

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$23.00

$18.40

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Robert Oster Khakhi - 50ml ink bottle with black cap and gold seal, featuring a grayish base swatch with warm gold sheen.

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Khakhi - 50ml

$23.00 $18.40

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Robert Oster Signature Ink Sublime - 50ml black-glass bottle with gold label, shown with a circular swatch of bright grassy green ink.

Sublime - 50ml

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$23.00

$18.40

X

Robert Oster Signature Ink Sublime - 50ml black-glass bottle with gold label, shown with a circular swatch of bright grassy green ink.

/ 1 / 2

Sale

Sublime - 50ml

$23.00 $18.40

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Bottle of Robert Oster Signature fountain-pen ink, Eucalyptus Leaf - 50ml, with a dark green/black ink swatch in the upper right corner.

Eucalyptus Leaf - 50ml

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$23.00

$18.40

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Bottle of Robert Oster Signature fountain-pen ink, Eucalyptus Leaf - 50ml, with a dark green/black ink swatch in the upper right corner.

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Sale

Eucalyptus Leaf - 50ml

$23.00 $18.40

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Robert Oster Australis Tea - 50ml Bottled Ink

Australis Tea - 50ml

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$23.00

$18.40

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Robert Oster Australis Tea - 50ml Bottled Ink

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Australis Tea - 50ml

$23.00 $18.40

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Robert Oster Signature ink bottle labeled Avocado - 50ml with a gold label, featuring a swatch of the ink color on the black plastic bottle.

Avocado - 50ml

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$23.00

$18.40

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Robert Oster Signature ink bottle labeled Avocado - 50ml with a gold label, featuring a swatch of the ink color on the black plastic bottle.

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Avocado - 50ml

$23.00 $18.40

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Robert Oster Signature Spearmint - 50ml fountain-pen ink bottle with a gold label, displayed alongside a circular swatch of its teal/green shade.

Spearmint - 50ml

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$23.00

$18.40

X

Robert Oster Signature Spearmint - 50ml fountain-pen ink bottle with a gold label, displayed alongside a circular swatch of its teal/green shade.

/ 1 / 2

Sale

Spearmint - 50ml

$23.00 $18.40

More Details →

Robert Oster Grun Schwarz fountain pen ink in a black bottle with gold label, featuring a dark reddish-black swatch with subtle sheen.

Grun Schwarz - 50ml

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$23.00

$18.40

X

Robert Oster Grun Schwarz fountain pen ink in a black bottle with gold label, featuring a dark reddish-black swatch with subtle sheen.

/ 1 / 2

Sale

Grun Schwarz - 50ml

$23.00 $18.40

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Robert Oster Citrus - 50ml Bottled Ink

Citrus - 50ml

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$23.00

$18.40

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Robert Oster Citrus - 50ml Bottled Ink

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Citrus - 50ml

$23.00 $18.40

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Robert Oster Signature ink bottle labeled Jade - 50ml alongside a circle displaying its medium mossy green hue, inspired by South Australia's wine regions.

Jade - 50ml

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$23.00

$18.40

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Robert Oster Signature ink bottle labeled Jade - 50ml alongside a circle displaying its medium mossy green hue, inspired by South Australia's wine regions.

Sale

Jade - 50ml

$23.00 $18.40

More Details →

Robert Oster Signature Ink, Emerald - 50ml bottle, displays a circular swatch inset with green/teal shading and sheen, inspired by South Australia's palette.

Emerald - 50ml

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$23.00

$18.40

X

Robert Oster Signature Ink, Emerald - 50ml bottle, displays a circular swatch inset with green/teal shading and sheen, inspired by South Australia's palette.

Sale

Emerald - 50ml

$23.00 $18.40

More Details →

Bottle of Robert Oster Signature fountain-pen ink in Light Green - 50ml, displayed with a swatch illustrating its vibrant green hue.

Light Green - 50ml

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$23.00

$18.40

X

Bottle of Robert Oster Signature fountain-pen ink in Light Green - 50ml, displayed with a swatch illustrating its vibrant green hue.

Sale

Light Green - 50ml

$23.00 $18.40

More Details →

Ryde Green - 50ml bottle of Robert Oster Signature ink displayed with a bright green ink swatch, showcasing its vibrant dye-based color.

Ryde Green - 50ml

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$23.00

$18.40

X

Ryde Green - 50ml bottle of Robert Oster Signature ink displayed with a bright green ink swatch, showcasing its vibrant dye-based color.

/ 1 / 2

Sale

Ryde Green - 50ml

$23.00 $18.40

More Details →

Bottle of Robert Oster Signature fountain-pen ink, Peppermint - 50ml, displayed with a matching deep teal-green swatch, inspired by South Australia's wine regions.

Peppermint - 50ml

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$23.00

$18.40

X

Bottle of Robert Oster Signature fountain-pen ink, Peppermint - 50ml, displayed with a matching deep teal-green swatch, inspired by South Australia's wine regions.

Sale

Peppermint - 50ml

$23.00 $18.40

More Details →

Green Lime - 50ml Robert Oster Signature ink bottle with green swatch, emphasizing sustainable Australian craftsmanship and vibrant, consistent performance for fountain pens.

Green Lime - 50ml

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$23.00

$18.40

X

Green Lime - 50ml Robert Oster Signature ink bottle with green swatch, emphasizing sustainable Australian craftsmanship and vibrant, consistent performance for fountain pens.

/ 1 / 2

Sale

Green Lime - 50ml

$23.00 $18.40

More Details →

Green Diamond - 2ml ink sample showing teal-green swatch with purplish sheen and darker striations, featuring THE DESK BANDIT watermark.

Green Diamond - 2ml

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$1.70

$1.36

X

Green Diamond - 2ml ink sample showing teal-green swatch with purplish sheen and darker striations, featuring THE DESK BANDIT watermark.

Sold Out

Green Diamond - 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

X

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

/ 1 / 2

Sold Out

River of Fire - 50ml

$23.00 $18.40

This product is sold out

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Robert Oster Signature Ink, Tranquility - 50ml bottle, features a gold-foil label and black cap, with a swatch showing its deep teal hue.

Tranquility - 50ml

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$23.00

$18.40

X

Robert Oster Signature Ink, Tranquility - 50ml bottle, features a gold-foil label and black cap, with a swatch showing its deep teal hue.

/ 1 / 2

Sold Out

Tranquility - 50ml

$23.00 $18.40

This product is sold out

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Robert Oster Verde de Rio - 50ml Bottled Ink

Verde de Rio - 50ml

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$23.00

$18.40

X

Robert Oster Verde de Rio - 50ml Bottled Ink

/ 1 / 2

Sold Out

Verde de Rio - 50ml

$23.00 $18.40

This product is sold out

More Details →

Robert Oster Opal Green fountain-pen ink, 50ml, in a small black glass bottle, alongside a bright mid-green ink swatch.

Opal Green - 50ml

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$23.00

$18.40

X

Robert Oster Opal Green fountain-pen ink, 50ml, in a small black glass bottle, alongside a bright mid-green ink swatch.

/ 1 / 2

Sold Out

Opal Green - 50ml

$23.00 $18.40

This product is sold out

More Details →

Robert Oster Green Green - 50ml Bottled Ink

Green Green - 50ml

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$23.00

$18.40

X

Robert Oster Green Green - 50ml Bottled Ink

/ 1 / 2

Sold Out

Green Green - 50ml

$23.00 $18.40

This product is sold out

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