Three things you can do:
1) Holders that protect against UV rays. Many probably do these days
2) Incandescent lights are better than fluorescent. Give off less UV.
3) Overall limit light exposure in whatever ways. For example, if you're going to be gone for 12 hours, don't leave the lights on, shades open. That would be useless light light because no one will even be there. Don't put the autograph in direct window sunlight when it could be as nicely displayed in in a windowless hallway.
I think some damage to baseballs, signatures whatever isn't caused by light. It can either happen naturally, via head humidity etc. I'm sure you'll hear about someone who kept a ball in a box in a dark closet for 10 years and the signature ink changed color and the ball toned. Remember, baseballs are made out of cow skin-- which doesn't sound as if it would be the most eternally stable material.
Last edited by drc; 01-07-2012 at 12:56 PM.
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