Two common causes of deterioration are UV light and dust/grease/etc from the air environment. UV protectant ball cubes protect against both to these.
If you want to put UV film on the cases, feel free. Though, depending on the degree of UV protection the cubes have, it might be overkill-- but overkill won't cause any harm.
UV protectant films, glass, holders et al offer different degrees of protection. There are two kinds of UV light and the degree of protection differ. If you have something that says blocks the whole spectrum at above 97%, you're doing well. I know that some films for glass offer very high protection. That they're film doesn't mean they're flimsy in their protection.
One thing to remember is that all glass blocks some UV light, so putting something behind any type of glass gives some UV protection. Not as much as material specifically designed to block UV light, but more protection than if the item is left in the open our outside in the sunlight.
Last edited by drcy; 10-03-2014 at 07:43 PM.
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