Normal glass (floatglass) does that. Museum glass is better.
http://www.flabeg.com/uploads/media/...tion_EN_02.pdf
(Liquid) gloss has the same contrast enhancing qualities as Diasec with acrylic glass but saturates the colors slightly, making for a very vibrant piece or artwork.http://www.candb.com/en/faq/25/#question_22
I haven't been able to compare before/after yet. I have however seen a cutout of "The Team", and it looks quite dull as a print.
Naturally I can't post a picture but when I first saw this (
http://www.candb.com/en/artwork/352/...e-shard-d.html) with acryllic glass, I had to blink twice.