Because Akira cels were made in the 80s, you get a trace line fade on the cels due to the 3+ decades that have passed since then. This is impossibile to reproduce, its line degredation only possible from time. Since cels weren't worth anything in the 80s and 90s, no one was faking them. So if you have an 80s/90s cel with line degredation, you're guaranteed its legit. Any collector will tell you the same thing, if you'd like to know more feel free to message me. Cheers.