PSA Holders, moisture & mold

talonmm

I have some vintage cards in psa holders and put them in a large fire-proof safe. I have never had a moisture problem in the safe but wonder if I should worry about leaving cards in the safe where there's no light and no air flow.

do you think the psa case will help keep moisture away from the cards or is there a chance I could develop mold or moisture problems? any insight would be apprecaited.

thanks,

hhmag70

I believe they make those special absorbant packs that take moisture out of the air and market them to be put into safes.