I meant to ask if it would get a purple label for restoration (not green), so I just edited my question. (Sorry about that...)
It seems that dry cleaning a book will generally not trigger a "restored" label, but many people say that wet cleaning will. I am trying to find the "bright line" between what cleaning is considered restoration, and what cleaning isn't. From what I have gathered, if anything is added to a comic book to change it from its original composition, then it is "restored." So, if any chemicals are added, that is restoration. But if it is just purified water on a q-tip, then that is not restored. But I don't know if this is correct.
Which brings up the issue of restoration removal - if someone uses chemicals to remove restoration (like color touch), why is the use of chemicals to remove restoration not considered restoration itself? (or maybe restoration removal does not use chemicals other than water? I don't really know much about removal.)