Tone separation - process of reducing the tonal range of a photograph to a very restricted range. The final result has strong highlights and deep shadows with a set number of intermediate tones. Also refereed to as Posterization.
Tone separation masks are used in non- technical photography to make color posterizations.75,79 Posterization is the technique of separating the tonal gradations of a photograph into clearly defined steps.
The first is "Tri-X Pan": ISO 400, available in 35mm and 120, much mid-tone separation and not much highlight separation.
In an effort to preserve midtone separation after extreme dynamic range compression, edge contrast is accentuated. This produces dark lines and bright halos, typically feathered rather than hard-edged.
Plate: An Offset Printing plate is a metal plate photo-etched from the halftone separation negatives.
Post-Production: A term taken from the motion picture industry which refers to all of the editing that takes place after the actual shooting of film.
With this simple tool and correction, we see that luminosity is the key to controlling many important things in the image: color, shadow detail, highlight detail, midtone separation and tonal blending.
The characteristics of a condenser enlarger are as follows: It produces maximum tone separation. It is suitable for making prints to a high degree of enlargement, because of its optical characteristics.
 See also: Light, Image, Photograph, Camera, Time
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