The practical printer : a complete manual of photographic printing (1874)
Hearn, Charles W · Philadelphia : Benerman & Wilson · leaf 79
to have the line shaded on it, the whole of which is then to be laid on a fiat printing-board. (See page 70.) There is considerable difference of opinion as to which side of the print the line is to be shaded, but the majority of photographers agree that it ought to be on the side of the darkest… … Avoid large lines on cartes de visite prints. On large prints, such as 11x14, &c., a proportionately large line is wanted, and when done nicely the effect is really beautiful. The size of the line on these prints, 11 x 14, should not be more than one- fifth, or less than one-tenth of an inch wide…
Photography -- Printing processes · Photographs on porcelain
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