Sakura Pigma Micron 01 - Pigment Fineliners - 0.25mm - Black [Pack of 3] Pack of 3 Black Pigma Fineliner Pens from Sakura. The durable 0.25mm porous-point nib delivers a consistent line as well as superb colour transferal. Sakura's unique PIGMA Ink is the first in the world to combine both water-based and pigment inks, making for vibrant colours that will not bleed through paper. The Archival Quality ink is also indelible, lightfast, and dries to a neutral PH.