Cels Forum

I just recently bought a cel and I looked at the back of it
and it's covered with black paint.  Why is that?  All the 
backs of my other cels show differernt colors that was 
used to create the image on the front.  But this one, the 
image is completely covered with black, making the cel extra
thick. It's a two layered cel and both layers are done the 
same way.  Any ideas?  

-ix