These archival pens use pigments instead of dyes, for longevity.
When permanence is required of a pen, whether for marking ballots to last for hundreds of years, or by top cartoonists, Sakura Pigma is their choice.
The ink dries quickly to a neutral pH, is waterproof, chemical resistant, not affected by temperature and permanent on paper.
Most importantly, these pens are a pleasure to use.
