Robert Oster Ink Bottle (50ml) - Mysterium - Endless Exclusive (2022)


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This is a Pre-Order item. See our Pre-Order Policy.



We received feedback from customers regarding the lack of sheen in the first batch of Mysterium inks. Robert Oster has generously created a new batch with additional dye. Please note that this ink is not considered a mega-sheener and was not intended to be.


Shake well before use! While Robert Oster has increased the dye in this batch, a sheen is not guaranteed in every circumstance for every pen and paper type. Please see the swatch below, provided by Robert Oster, when the ink is heavily applied to bring out the sheen:


In collaboration with Robert Oster and micahfinds, EndlessPens proudly presents a Halloween themed ink "Mysterium"! This ink is produced for and sold exclusively on EndlessPens.com!

Mysterium is a violet with feint blue wash and bronze sheen. Inspired by magical potions concocted in the witch's cottage.


- Type: Ink Bottle
- Volume: 50ml
- Bottle Material: Carbon free plastic


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