Cels Forum

I was reading through the posts about sticky "mouths" etc,
and a few people suggested 
to keep cel layers unstuck if possible... well, how would one
do that?  A few people said something about putting plastic
between the layers, but since the paint is designed to stick
to plastic, then wouldn't the cel paint stick to the new
plastic layer?  And wouldn't adding more layers (like to a
5 cel set up for example) make the bottom layers less bright 
and sharp?  I am totally new at this so please let me know
if I'm missing something!