Posted By:
MikeU"There is no deterioration in the effectiveness of holders with UV filtering attributable to time or use.
Do I have this right? Is there anything which you would like to add?"
Gil,
That is correct. However, keep in mind that after a period of time e.g. 1 year or so, the difference in damage between a unprotected object and an object with UV protection is negligable. The UV filtering did not change, it is just that enough UV light passes through over time to cause the same amount of damage as an item with zero protection.