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Posted By: warshawlaw

It would either be a print or a transparency (positive film). And the key difference from a straight painting over the image is opacity of the material. If you paint over an image the result is more opaque than applying a thin wash of dye over a picture or transparency, which lets the underlying image show through, which is why a hand-tinted photo or transparency looks photographic. Today, of course, the whole thing is done with computer software. I still don't think it has the same quality as a hand-tinted image, though, since any hand-applied process is going to have minute differences in degree of application as the artist wields a brush or airbrush.