Sign writing and glass embossing : a complete practical illustrated manual of the art, to which are added numerous alphabets (1890)
Callingham, James · Philadelphia : H. C. Baird & co. · leaf 123
NG. The other kind of sunk letters is formed on a some-what similar principle as regards light and shade, butthe shadow, if any, is less defined. A light side and adark side are generally adopted for the vertical strolvcsin representing these letters, the horizontal lines beingmarked by a stronger… … These are sufficient to sliow the general principle uponwhich sunk letters should be imitated, and it will reatl-ily be seen what an extensive field is here opened up tothe beginner. It is not necessary to enlarge upon this subject. Afew attempts, based on the foregoing illustrations, willconvince…
Embossing (Printing) · Signs and signboards, Glass
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