This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
Retouching The Forehead In Profile Views. In a profile view of the face the highest point of light on the forehead will rest almost directly above the temple and you should start to retouch and remove the imperfections at this point. This being the only high-light on the forehead you simply work down into the surrounding shadows and around towards the front of the face, very carefully blending and allowing your touch to become lighter as you gradually work into the shadows and towards the hair.
237. As a rule, there is a certain amount of harshness or abruptness at the hair line. This should be softened, as it adds beauty to the portrait. A harsh outline on the face where the hair begins, always tends to give a very unpleasing portrait. With women subjects, where the hair is slightly curly, the outline may be conveniently softened. The retouching in the forehead should be carried down to the temple only.
238. In Illustration No. 14 we present four views of the forehead, two of which are unretouched, while in the remaining two, only the forehead is worked and completely modeled. Compare your results with these illustrations, which will serve as a guide to follow. After the work on the forehead has been followed, complete proof-prints should be made, to be used for future comparisons. These will serve as an excellent guide, and after you have passed this stage, these proofs should be filed in your proof-file for future reference.
 
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