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Robert Oster Ruby


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Robert Oster is new player in fountain pen ink market. He operates through retailers worldwide. The inks are sold in 50 ml PET bottles with a tightly secure twist cap. I don't know who makes the inks for the shop, but the colors look interesting and fresh. At the moment Robert Oster inks are available in billion colors - I lost track how many.


Sample of Ruby was given to me by Mmg112 - thanks!

I believe Ruby is a special release for the Sakura Fountain Pen Gallery in Belgium but I'm not 100 % sure. The color of this ink is acceptable although lack of good lubrication and average flow won't make me buy a bottle. It's average ink. Personally I think you'll easily find more interesting red inks on the market.

Flow: average.

Saturation: average

Lubrication: average

Drying time: rather reasonable. 10-15 seconds on Rhodia, 5 – 10 seconds on absorbent paper.

Clogging issues: None experienced. The ink may dry in the nib but only after few minutes. You can leave the pen uncapped for 2-3 minutes and everything should be fine.

Feathering: some experienced on Moleskine.

Bleedthrough: almost none.

Water resistance: this ink isn't water resistant.

Drops of ink on kitchen towel


Software ID


Color range


Rhodia, Jinhao x750, medium nib



Leuchtturm 1917, Jinhao x750, medium nib



Tsubame, TWSBI 580, medium nib




Edited by visvamitra
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Never heard of Robert Ostee but your review is a nice invitation to look into that


Thanks Visvamitra

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It's a bright red, but it doesn't look like ruby to me. But thank you for your review, Vis.

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I have his Fire Engine Red. I will stick with that for the brand.


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Not really a red for me. But there is *something* about that ink. Looks as if you're getting what other people have referred to as "haloing" (the crisp dark edging on pen strokes). So this one might be a "maybe" ink after all....

Thanks for the review.

Ruth Morrisson aka inkstainedruth

"It's very nice, but frankly, when I signed that list for a P-51, what I had in mind was a fountain pen."

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Robert Oster is new player in fountain pen ink market. He operates through retailers worldwide. The inks are sold in 50 ml PET bottles with a tightly secure twist cap. I don't know who makes the inks for the shop, but the colors look interesting and fresh.


It was my understanding Robert Oster made his own inks. At least I got that impression from an interview with him that was linked on FPN recently.

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Thanks for your review, Vis. You're correct that this ink is exclusive to Sakura Fountain Pen Gallery in Belgium, as confirmed by Catherine at Sakura and Rob Oster. While my preference leans to darker reds, I find this one to be an acceptable middle of the road Red like Schaefer Skrip Red.



Edited by mmg122
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  • 3 weeks later...

Thanks for the review. I like the looks of this one, but I really prefer wet wet wet inks.

Fountain pens are my preferred COLOR DELIVERY SYSTEM (in part because crayons melt in Las Vegas).

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Ink comparisons: The Great PPS Comparison 366 Inks in 2016

Check out inks sorted by color: Blue Purple Brown Red Green Dark Green Orange Black Pinks Yellows Blue-Blacks Grey/Gray UVInks Turquoise/Teal MURKY

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  • 2 weeks later...

Too orange to be a true ruby. People who need to grab attention will probably like it a lot, because all that orange makes it a very loud red. I think I can hear it all the way from Australia.

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