How do they color old black-and-white movies?

entertainment.howstuffworks.com — I don't know about you but I've always wondered how they did this... Most of the classic black-and-white movies have been "colorized," mainly so that they can be shown on television in color. It turns out that the process used to add the color is extremely tedious -- someone has to work on the movie frame by frame, adding the colors one at a time t Jun 27, 2007 View in Crawl 4