Vine, Charles J., author · London : Charles Roberson & Co., Artists' Colour Manufactory · leaf 62
28 are so unnecessary, nay, wasteful, in work for process re- production, because the greater part are lost. It has been suggested that all the dark parts of the photograph should be retouched. It is often advisable to retouch the light parts also, and thus remove all the brown, and with it all…
Drawing · Prints
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.