A 2ml sample of Robert Oster Black Violet fountain pen ink, in a labeled plastic vial.
- Robert Oster
- Ink Samples
- Fast Drying
Whether or not the ink contains glittery particles.
- Freeze Resistant
Whether or not an ink is specially formulated to better withstand freezing temperatures.
- Iron Gall
Ink made from iron salts and tannic acids. Though quite permanent and waterproof, these inks are typically known for causing chemical corrosion to metal pen parts (especially the nib) and should be used sparingly or with less-valuable pens.
Whether or not an ink is specially formulated to increase flow in your pen.
Whether or not the ink contains finely-ground solid particles in liquid suspension.
- Water Resistant
Whether or not the ink, once dried on the paper, will resist being washed away with water.
Reviews & Questions
How do I fill my fountain pen from an ink sample vial?
It depends on the fountain pen's filling mechanism. Check out this video for a variety of techniques:
How much writing can I do with 2ml of ink?
It really depends on how big or small you write, and the nib size you’re using. We find that usually you can get 2 good fills for a typical converter with our Ink samples, or one good fill with a piston-filling pen. How much writing depends on you more than anything else, so we recommend experimenting with different nib sizes to find what works best for you.
What is shading, sheening, or shimmering ink?
Shading - A common (and often desired) result of a fountain pen ink pooling in certain parts of a letter when writing, so that the color and saturation of the ink appears different within a single letter or word. This characteristic cannot be achieved with ballpoint or rollerball pens and is a very appealing aspect of fountain pen use for those particularly drawn to all the pretty ink colors.
Sheen - Characteristic of a fountain pen ink where when ink pools another color can be seen on top of the ink, especially when looked at in different light angles using certain paper types.
Shimmering - Fountain pen ink that has small particles of glitter mixed in. There is no way to guarantee an ink will sheen, but using a larger nib on a pen will help obtain sheening results in your writing.
What's your return policy?
We do not accept returns for ink that has been used. Otherwise, we accept returns on unused ink products for up to 60 days from purchase. You can read all our Return Policies here.
To initiate a return, please submit a request at the Return Portal. Our Customer Care team might reach out to you for more information.
Robert Oster Black Violet - Ink Sample
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