50ml bottle of Sailor Kiwaguro ink
Compatible with all fountain and calligraphy pens, plus Tom's Studio Lumos and Wren. The 'super tiny particles' make this ink dark black and highly water resistant without clogging internal pen mechanics.
Make sure the ink is dry before adding other layers and you can use it with watercolour without smudging.
Archival, bleed-resistant with minimal show through.
Another exceptional ink by Sailor.