Cels Forum

You can purchase 11"x14" precut mat boards($3).  Most of them are 
acid free, but in order to check for sure, you can purchase an
acid tester marker ($6).  Cels expand and contract with climate in 
your dwelling, so you have to allow them to do that by attaching 
them to the mat board only on the top two edges and using acid 
free-tape ($2). An 11"x14" frame ($13) can also be purchased ready 
made and the glass easily replaced with UV protective glass. A sheet
of acid free colored paper ($0.10)can be used behind the cel if there
is no backround.  I've acid tested sketches that came with some of
my cels and they are not acid free, so if your drawings are not
perminently adhered to your cels, I suggest you keep them separate.
All these supplies can be purchased at your local craft store.

Metaphor (is a cel by any other name still a cel?)