A couple of years ago I got it into my mind to do a practical test on the lightfastness of the inks & pens we had around the house. The slip on the left was sealed with epoxy between two plates of glass and has been on the balcony in ambient sunlight; the one on the right has been kept in a safe in a closed envelope. Here are the results after two years; the test shall now continue. Thought this might be of interest to some of the artist here. #ink #calligraphy #fountainpenink #fountainPen