*snip*
Not sure if this has been mentioned here before but I know glass blocks most UV light. Here is the best explanation I can find and link on the webbernets...
http://www.physicsforums.com/archive.../t-382015.html
The point being that using a glass jar is like putting spf 100 sunscreen on the pieces before putting them out to get as much UV light as possible. Knowing this I tried a different method and got full white in about 1 hour. And putting a jar behind a window is about as good as sticking it in a dark closet.
I used a glass roasting pan like this
http://iweb.foodnetworkstore.com/ima...dde/187479.jpg I only used regular store bought 3% peroxide amped up with 1tbs of oxygen cleaner per 50ml. I arranged the pieces and placed outside in a nice sunny section of my deck. I mixed the peroxide and powder in a pitcher and only poured on after I had the roaster where I wanted it. Thin liquids and somewhat shallow pans are a big splash risk and I would hate to get this on my carpet. I covered in plastic wrap and since I had one to use I propped up a mirror next to the pan to drop even more uv rays on the brew. I did this in hopes of avoiding multiple days of soaking, Victory Leo had extensive yellowing. After a little over one hour I went out to make sure the brew was still out of the sun and adjust the mirror. After adjusting I got curious and pulled back the plastic wrap and fished out a piece from under the foam and I was shocked, it was one of the pieces that was almost beyond yellowing and at the point of browning but now after only a few minutes it was white as mountain snow. I brought it in, washed and compared and it was fully whitened.
Long story short (tldr) Get as much uv light as possible and don't worry about strong peroxide. I did this on April 9th in a north Atlanta suburb in 2pm sun.