Compiled from 6 sources; we haven't tested this product ourselves yet. How we research
Quick answer
Robert Oster Fire & Ice is a bright blue fountain pen ink with a slight green lean and a pink sheen, made in Australia and sold in a 50 ml (1.7 fl oz) recyclable PET bottle. It is a plain dye ink, not water resistant, with medium shading and sheen and a dry time of about 30 seconds on Rhodia.
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The 50 ml PET bottle, drawn in proportion, with a swab of the ink.
Product facts
Product
Robert Oster Signature Fire & Ice fountain pen ink, 50 ml bottle
Dye-based fountain pen ink in a recyclable PET plastic bottle
Price range
$$$$20–75 per item
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Notes on these facts
Made by Robert Oster Signature, Coonawarra district, South Australia. Made in Australia: Goulet's listing (read in full on October 21, 2026) says Robert Oster Signature inks are handmade in Australia and that the PET bottles are made in Australia's first carbon-neutral plastics plant; it quotes Robert Oster saying the inks originate from the Coonawarra district of South Australia. Goldspot also says the inks are made in Australia. Robert Oster's own site (robertosterink.com) didn't load from our network, so we couldn't read the maker's page. Source. Price: example listing.
Price bands are typical US retail, checked October 2026. Conversions to US dollars are approximate, at October 2026 rates (US$1 = ¥158 = ₩1,330 = NT$32.5 = CN¥6.7 = SEK 9.9 = DKK 6.7 = ₺49.6 = C$1.41 = A$1.43 = CZK 21.7; €1 = US$1.12; £1 = US$1.32; CHF 1 = US$1.21).
Key takeaways
One bottle holds 50 ml (1.7 fl oz) in a PET plastic bottle with a 17.4 mm (0.69 in) opening, per Goulet.
On October 21, 2026 it ranked 16th among Goulet's bottled inks sorted by best selling, and 8th on a 2022 Fountain Pen Companion list (579 owners).
Pulp Addiction lists a dry time of 30 seconds with a medium nib on Rhodia.
Goulet lists it as not water resistant, not shimmering and not pigmented.
Robert Oster Signature inks are handmade in Australia, in South Australia's Coonawarra wine district, per the maker's note on Goulet.
What is Robert Oster Fire & Ice?
It’s a bright blue fountain pen ink with a slight green lean and a pink sheen, from Australia’s Robert Oster Signature range. Mountain of Ink sums up the name: the ice is the blue and the fire is the pink-red sheen. Goldspot says the name comes from Robert Frost’s poem.
It’s one of the best-selling inks in the US. On October 21, 2026 it ranked 16th among Goulet’s bottled inks sorted by best selling, and a 2022 Fountain Pen Companion top-25 list ranked it 8th, owned by 579 users. Mountain of Ink thinks part of the hype is that it was one of Robert Oster’s first popular inks.
Fire & Ice specs
Spec
Value
Maker
Robert Oster Signature, South Australia
Item code
50112 (Robert Oster); RO-50112 (Goulet)
Bottle
50 ml (1.7 fl oz), recyclable PET plastic
Bottle opening
17.4 mm (0.69 in), per Goulet
Ink type
Dye-based; not pigmented, iron gall or shimmering (Goulet)
Water resistance
None (Goulet)
Dry time
30 s, medium nib on Rhodia (Pulp Addiction)
Shading / sheen
Medium / medium pink (Mountain of Ink, Pulp Addiction)
Price band
$$$ ($20–75 per bottle)
Robert Oster doesn’t publish a bottle size we could read, so our cover draws the bottle in proportion. On October 21, 2026 the Australian retailer Pulp Addiction listed the 50 ml bottle at A$23 (about US$16).
How many converter fills one 50 ml bottle holds (bottle ÷ capacity), with Fire & Ice's sourced properties.
How does Fire & Ice look on paper?
Bright blue-teal in normal writing, with pink sheen where the ink pools. Mountain of Ink says it has more green than a turquoise but not enough to be a teal, and rates the sheen and shading medium.
Paper matters a lot for the sheen. It shows most on smooth, coated paper like Tomoe River, and in wet, broad nibs. In Mountain of Ink’s paper test it feathered and bled only on Baron Fig paper.
How fast does Fire & Ice dry, and is it waterproof?
It dries in about 30 seconds and isn’t water resistant. Pulp Addiction lists 30 seconds with a medium nib on Rhodia, and Mountain of Ink calls the flow and dry time average.
Goulet’s specs list it as not water resistant. For envelopes or documents, use a pigment ink such as Platinum Carbon Black instead.
Which pens is Fire & Ice safe for?
Any fountain pen that takes bottled ink. Goulet lists it as a standard ink: not iron gall, not pigmented and not shimmering, so it needs no special care.
A demonstrator such as the TWSBI ECO shows off the color in the barrel. One 50 ml bottle is about 28 ECO fills, or about 62 fills of a 0.8 ml LAMY Z28 converter.
How does it compare with other sheening blues and teals?
It’s brighter and greener than most blues, and lighter than the darker sheeners. Here’s how it sits next to two inks we cover.
Pick Emerald of Chivor if you want sparkle too, but it needs more cleaning. Our best fountain pen inks roundup picks one ink per use.
Why is the bottle plastic?
Robert Oster chose PET because it’s recyclable and stores well. In a note quoted by Pulp Addiction, he says PET is the world’s most recycled plastic, more often recycled than glass, and that the shape fits neatly in a drawer.
Goulet adds that the bottles are made in Australia’s first carbon-neutral plastics plant. Pulp Addiction says Robert Oster fills bottles to order rather than warehousing stock.
Where is Robert Oster Fire & Ice made?
In Australia. Goulet says Robert Oster Signature inks are handmade in Australia, and quotes Robert Oster saying the range comes from the Coonawarra wine district of South Australia; Goldspot also says made in Australia.
Robert Oster’s own website didn’t load from our network on October 21, 2026, so the facts here come from retailers who carry the maker’s description. We didn’t find a release year for Fire & Ice.
Frequently asked questions
What color is Robert Oster Fire and Ice?
A bright blue with a slight green lean and a pink sheen. Mountain of Ink says it has more green than a turquoise but not enough to count as teal; the ice is the blue and the fire is the pink-red sheen.
Does Fire & Ice really sheen?
Yes, where the ink pools. Mountain of Ink and Pulp Addiction both rate the pink sheen medium; it shows best in wet nibs and on coated paper such as Tomoe River, and much less in a fine nib on copy paper.
Is Robert Oster Fire & Ice waterproof?
No. Goulet's specs list it as not water resistant, so a spill will lift and blur it. Use a pigment or bulletproof ink for anything that must survive water.
Is Fire & Ice better than J. Herbin Emerald of Chivor?
It depends on whether you want sparkle. Emerald of Chivor adds gold shimmer to its red sheen but needs more cleaning, while Fire & Ice is a standard dye ink with a pink sheen and needs no special care.
Is Fire and Ice safe for my fountain pen?
Yes. Goulet lists it as a standard ink, not iron gall, not pigmented and not shimmering, so it suits any fountain pen that takes bottled ink.
Is Robert Oster ink made in Australia?
Yes. Goulet and Goldspot both say Robert Oster Signature inks are made in Australia, and Goulet adds they are handmade there.
How many converter fills are in a bottle of Fire & Ice?
About 62 fills of a 0.8 ml LAMY Z28 converter, or about 125 of a 0.4 ml Pilot CON-40, from one 50 ml bottle.
