Make your writing sparkle with our new TwINKle inks! These inks contain a shimmering particulate that create a beautifully unique writing line.  Twinkle inks require additional pen maintenance and cleaning compared to their traditional ink peers and perform best in a pen with a medium sized nib or broader. Please don't use Twinkle inks in vintage pens or pens that cannot be disassembled for cleaning. Each jar provides approximately 150 standard converter refills from its generous 120mL volume assuming an 0.8mL draw. A small amount of headspace is intentionally left above the liquid in the jar to help with agitation and pigment dispersion. Every batch of Birmingham fountain pen ink is manufactured by hand in-house from a series of raw ingredients selected for quality and consistency. Each bottle is poured, capped, and labeled by hand.