This Signo 307 gel ink refill features an innovative cellulose nanofiber ink derived from the pulp of the same tree used to make paper. This material gives the ink a very smooth and skip-free writing experience. Like other Signo pens, the pigmented ink is also waterproof, leak-proof, non-fading, and acid-free.

Weight 0.1 kg
Color

Black, Blue, Red

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