Articles liés à Modern Heliographic Processes: A Manual of Instruction...
Modern Heliographic Processes: A Manual of Instruction in the art of Reproducing Drawings, Engravings, Manuscripts, etc., by the Action of Light; for ... Draughtsmen, Artists, and Scientists - Couverture rigide
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Présentation de l'éditeur
The book is intended for the use of engineers and draughtsmen, who are so frequently in need of a good process for reproducing their drawings. After a brief theoretical introduction on the chemical and physical action of light, the author classifies the processes with salts of silver, with iron salts, with salts of chromium, and with salts of uranium. He gives practical instructions in regard to the paper to be used, the methods of sensitizing, and the trays and dishes used for the purpose, and describes various forms of printing-frames. Formulae which were found not practical, but which are recommended by reliable authorities, have also been given. The patented processes are included, although they cannot be used generally, in order to give a complete review of the subject treated. The first thousand copies of the book are accompanied by ten specimens of heliographic prints, among which the uranium and carbon prints deserve special mention. The first chapters, in which the methods of sensitizing and printing are described, are accompanied by numerous figures illustrating the instruments and processes.
— The Photographic Times, Vol. 19 [1899]
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