cel damage types?

Hello folks I'm new to this site so, hello all.
The oxidation that you have been talking about is called (foxing).
It is from a small amount of water on the art work at some time be it from the frame sweating or to much humidity in the room or changes in room temp.that the artwork is in.
The water is not the stain you see the stain is a mold that eats the artwork that was wet at some time or another.
It will grow if not removed the next time it gets water.
Foxing is mostly seen on lithos, backgrounds,posters anything paper or anything that comes in contact with the paper I E your cels.
It can be brown.yellow,white,black or even red in color and the good news is it can be removed by any art dealers that restore animation art.
Do not store your artwork in cardboard it has mold in it from the wood pulp its made with.

you may want to add to your list (is this a cut scene or a trailer scene or non used production art).
I hope this helps some.
Roy

That was very helpful Roy. It is the first time that I heard of the term "foxing". Indeed it is so good to know that the situations can be solved, and also, the point to get rid of the cardboard!

Thank you!

That *is* pretty cool. Actually, by putting in "foxing" and "animation restoration" into a search engine, you can learn a lot about how bad and how reversable to a cel. I'm just a programmer and an amateur collector so I'm not really an expert on restoration.

Suggestions duly noted for use when I get to upgrading the shop. Thanks, Roy.

Your very welcome.
I'm no expert by no means and if some one tells you they are, There just pulling your leg.
With all the production companys out there now, They all use different inks paints papers ect.
No one person can know it all.
I've been collecting and selling cel art for over 25 years and I'm still learning every day.
If you need to know something about animation art and can't find it just email me and if I don't know it I have it in a book somewere.
I'll be glad help if I can.
I have close to 4 million cels and I've seen just about anything that can happen to them at one time or another.
So feel free to email, Info is always free.
Roy