Pigma Micron from Sakura is a permanent, acid-free and archival pen. Ideal for technical drawings as well as sketching, drawing and manga. It is permanent, fadeproof and does not bleed on paper.
The reference price is the lowest price applied to the product 1-30 days before the relevant price cut was implemented. The exception is if gradual reductions have been made, in which case the lowest price 1-30 days before the first price reduction is shown.