[Franek Grabowski]

Well, I see a serious lack of knowledge and even ignorance concerning the matter. You must be awared that NO colour film faithfully reproduces colours. Therefore at the start we receive false colours. Then, during processing we may receive further errors, then if we are making prints, colour balance is set up individually, also to correct colours! Then during scanning the photo is again adjusted in order to keep authentic colours. Then again during DTP the photo is again adjusted to prepare it for printing process. Finally, printers give us a printed photo which is again slightly different to what they have received. Summarising, every photo is a forgery. The same applies to B&W photography, where several tricks .
Of course anyone may scan photos from a book and correct them according to his taste. The problem is however that the original photo/scan does contain much more information than the one in print. Therefore much better effects may be achieved when working with the former and not the latter.