I was curious to know if the clear plastic top loaders are known to fade autographs off of glossy surfaces? Back in February I got a 24x36 glossy poster signed, i waited 24 hours before putting it in the top loader purchased at comic con (of a unknown brand, purchased from a comic con vendor). I pulled the poster out today, only to find that the signature (signed in silver sharpie) had faded away.....is this typically known to happen? Or is it silver sharpies that fade on glossy surfaces? Any particular way to care for these types of autographs?