The Fountain Pen Physicist tackled a question on lots of pen users’ minds: How lightfast are my inks? And in true scientific method, there are samples of both ambient and sunlight samples compared to the originals after three months of exposure. I hope there will be follow-ups at 6 months and a year to see if any further changes occur.
It looks as if more tests are being performed as well as waterproofiness. What a fabulous resource!
(via Fountain Pen Physicist)