Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 320
an a few hours before theyare required for use ; they become yellowand discolored by long keeping. 28. Making the Photograph.—Wehave now described several methods bywhich paper may be prepared in such away that it will very quickly blacken allover, if exposed to light; but it will be ob-vious that,… … 308 The Flioiograi^liic Art-Journal. November, such prepared paper, and exposed to sun-shine, the paper will become black allaround the leaf, but underneath it, it willnot have been blackened, except partially,under those parts of the leaf less opaquethan the rest. The light will shine throughthese…
Photography · Art and photography
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