International Correspondence Schools · Scranton, The Colliery engineer company · leaf 123
neutral color, as gray, brown, etc., of which e is the transparent shade ; while / is the naturalshade on the ground color,made with the same as e, butgiving an entirely differentshade. 73. The S p e c t r 11 mShade.—This is produced byblending shades together, andits use is confined… … Fig. 5.
Lettering · Sign painting
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