The Great Grey Fountain Pen Ink Comparison

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Robert Oster Tranquility — Mountain of Ink

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Pilot Iroshizuku Kiri-same - Fountain Pen Companion

A 2ml sample of Diamine Earl Grey fountain pen ink, in a labeled plastic vial. This color was chosen by members of the /r/fountainpens reddit

Diamine Earl Grey - Ink Sample

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This 45ml glass bottle of Document Ink Urban Grey fountain pen ink is permanent and waterproof, and can be mixed with other De Atramentis Document ink

De Atramentis Document Ink Urban Grey - 45ml Bottled Ink

Akkerman #29 Hofvijver Grijs - Fountain Pen Companion

The Great Grey Fountain Pen Ink Comparison