Thanks again for your help, I will try that test piece as soon as I get a chance. I do use acid free board, as well as frame it under UV protecting glass. But I will say that if you have any piece you either buy or created for yourself, you should try and keep it out of direct sunlight anyway. But you got me thinking, I wonder if those older pieces I did so long ago ARE in fact faded and I just don't notice it. How depressing. If so I will have a series of invisible people sooner or later.
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