Inktend / Ink library / Deep Sea
Robert Oster
Deep Sea
Blues & navies
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An Australian ink maker known for saturated, often sheening colors and frequent small-batch releases.
Specs
Color familyBlues & navies
Approx. hex#1F5F6E
SheenNot typically noted
BrandRobert Oster
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About Robert Oster
An Australian ink maker known for saturated, frequently sheening small-batch colors.
Australia
Founded c. 2014
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Paper & pairing notes
Blues and navies are the most broadly "safe" fountain pen colors — legible, professional, and unlikely to raise eyebrows in an office. This ink will behave predictably on most fountain-pen-friendly paper. Cheap, highly absorbent paper (standard copier paper) will dull any ink's saturation and can cause feathering or bleed-through with wetter nibs.
Storing and using the bottle
Bottled fountain pen ink has an effectively long shelf life when kept capped and out of direct sunlight — most inks remain usable for years. The main risk isn't the ink spoiling, it's a pen sitting inked and unused for weeks: that's what causes clogs, not the ink's age.
Frequently asked questions
What color family is Deep Sea?
Deep Sea falls into Inktend's blues & navies family based on its typical swatch color.
Does Deep Sea have sheen?
Deep Sea is not typically noted for sheen. If you want that effect, browse similarly colored inks tagged with sheen in the ink library.
How should I store a bottle of Deep Sea?
Bottled fountain pen ink has an effectively long shelf life when kept capped and out of direct sunlight — most inks remain usable for years. The main risk isn't the ink spoiling, it's a pen sitting inked and unused for weeks: that's what causes clogs, not the ink's age.
What paper works best with Deep Sea?
Blues and navies are the most broadly "safe" fountain pen colors — legible, professional, and unlikely to raise eyebrows in an office. This ink will behave predictably on most fountain-pen-friendly paper. Cheap, highly absorbent paper (standard copier paper) will dull any ink's saturation and can cause feathering or bleed-through with wetter nibs.
Similar shades
Color shown is a close digital approximation of a typical swatch, not a calibrated color match.