Fountain Pen Physicist Ink Lightfast test

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.

Fountain Pen Physicist Lightfast tests

It looks as if more tests are being performed as well as waterproofiness. What a fabulous resource!

(via Fountain Pen Physicist)


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