God, I've been collecting for over a year, you'd 
think I wouldn't be so ignorant. But, I am still 
fairly new to this. Here's my question: I store 
my cels, backgrounds and sketches seperately. I 
have three of those Itoya art portfolios(11x14 
for sketches, 11x17 for backgrounds, and 14x17 
for cels). I store my cels in my closet on a 
shelf. My question is: Is having those cels in 
one big book laying flat OK to do? Or, should I 
store them another way? Doesn anyone have tips on 
how I should store my cels? I am open to all 
advice. Thanks for your help in advance.