(In reply to Wazzles’ post):
From Zombie’s article on the subject over at Saving Star Wars:
“The 1985 interpositive was already starting to go pink in 1993 when that release was made, the final home video telecine. By 2020, it will be pink, but salvageable, but all release prints would basically be unwatchable as-is, even Return of the Jedi’s.”