[old_tv_nut]

One thing to add: although the variations in the video gear are gone in modern copies, many Technicolor movie videos still have color "breathing" - the color balance changing slightly and somewhat randomly over a time frame of a second or so. The DVD of "DuBarry Was a Lady" that I have has that and color registration that changes from scene to scene and also is not the same everywhere in the frame. The variable registration is often not noticeable on top of minor convergence issues on an old set, but is very visible if I view the disc on my flat screen.

Warner Bros. is now capable of restoring the color registration to better than what could be achieved in the Technicolor printing process, even when the negatives were new and had not shrunk. As a result, they discovered in "Robin Hood" that Maid Marian's costume had gold threads woven into the fabric, which were obscured in all previous prints.