Ok, Sean (BadDeacon) got me all paranoid about how my art is framed.
Since custom framing in many cases costs more than the art I'm framing and I was able to pick up the 11x17 frames at Michael's on sale for ~$17 each, I have most of my art in "off the shelf" frames.
That said, I don't have any of the art in direct sunlight so was not worried about UV glass, and I was unaware of the apparent dangers of having art come in direct contact with the glass.
You can use acid free mattes to hold the art away from the glass, but with this option you need to:
* Get a larger frame to allow for the size of the matte, this will take up more wall space, which I consider at a premium.
* You generally need to get custom cut mattes since I've never seen an off-the shelf one with an 11x17 opening. This adds to the overall expense.
The other option for holding the art away from the glass is to use framing spacers. This is what professional framers use. This is the option I went with.
So, I had 3 things I needed to do:
1) Replace the regular glass with UV protected glass
2) Get framing spacers
3) Get acid-free paper to place between the art & the frame backing
I went on a quest to get this done, and here is what I learned:
Michael's was not able to help me with buying individual framing supplies to do the work myself, they suggested I check out Aaron Bros.
I went to Aaron Bros. and talked to the Manager on duty there who was very knowledgeable about custom framing. She told me she could sell me UV protected glass, cut to 11x17 for $5 each. I wanted to try it out before I got it for everything, so I bought 6 pieces. It took them 15 minutes to cut the glass, I brought it home and slid it into my existing frames and it's great. (Now I have 17 more 11x17 frames to go before I start in on the smaller frames).
I wanted to get framing spacers to hold the art away from the glass & they told me that they'd need to charge me ~$10 per frame, but that I could buy the stuff in bulk on-line.
I found these:
http://www.artright.com/FStools.htm
http://www.artspacers.com/index.cfm
I just bought 200' of this stuff. That will allow me to add spacers to all my art frames (it takes 4'8" for an 11x17 frame, 4'2" for an 11x14, and 3'3" for an 8.5x11). This set me back $99 with shipping, so the spacers cost me 50 cents per foot.
Finally, back to Michael's (last day of the 20% off your entire purchase coupon sale) to buy big sheets of acid free art paper that can be cut to size and acts as a buffer between the back of the art & the backing.
Total cost:
$17 Original frame (bought off the rack @ 50% off)
$5 UV glass
$2.50 framing spacer
$0.50 acid free paper
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$25 vs. $100 to $150 for a custom framing job.