This post is in English because there isn’t much information available on fountain pen ink lightfastness, so I think it’s important to share test results. I am testing inks from the following brands:
Noodlers (mainly the bulletproof series)
Rohrer & Klingner Sketch ink
Sailor Storia and Sei Boku
De Atramentis document ink
PW Akkerman (only a few)
These are the starting pages. I used Canson 1557 paper which is 180grams.
On April 1, 2019, the ink swatches were placed on the window of my garden shed and will receive sunlight for most of the day. I plan to leave them out there for about 6 months.