Mechanical Preparation, ContinuedRetouchingPhotographs are rarely used for reproduction without some work being doneto them to highlight important features or to suppress undesirablecharacteristics. You may eliminate minor flaws in a photograph by using aphoto retouch pencil or opaque retouch greys applied by brush or airbrush.Handle a photograph carefully and avoid leaving fingerprints on the photosurface during preparation. Your natural oils will prevent the paint fromadhering. The surface of a photograph has a slick resin coating which youmust lightly abrade with Fuller's Earth, a fine, white powder, before youbegin retouching. Paint the light values first, then the middle values. Paintthe dark values last.RETOUCH PENCILS: Retouch pencils are available in various shades ofgrey and color. Avoid digging into the surface of the photograph. Use aslow, fine, circular motion to match the values in the image and spray thefinished print lightly with a fixative.RETOUCH GREYS (cake form): Retouch greys are a series of opaque greysplus black and white in a premixed cake. Wherever you use white, use itpure or it will reproduce as a light grey. Spray the retouched print with afixative.RETOUCH GREYS OR COLOR (liquid form): Apply liquid form retouchgreys or colors with an airbrush. Extremely detailed or extensive retouchingis possible.Figure 1-32 shows retouch greys in cake form.Figure 1-32. —Retouch greys.Continued on next page1-43
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