Anime-Beta TNG

I had been more involved with cels a few years back but I had went to look at my cels the other day and noticed the black paper, from the cel book I had bought for them, were sticking to some of them. They weren't in cel bags but I got some now. But how should I go about separating them without dama...

I would like to get sketches from...

Elfen Lied
Basilisk
Avatar: The Last Airbender (if ever in existence)
Teen Titans (CN)