The silver sunbeam : a practical and theoretical text-book on sun drawing and photographic printing (1873)
Towler, John, 1811-1889 · New York : E. & H.T. Anthony · leaf 578
rate silver, 4 ounces. Water distilled, .... 40 " When the silver is all dissolved, add eight grains of iodide of potassium dissolved in one ounce of water. Shake the whole well up and filter. In trying a plate, if there is any trace of fog (not from over exposure), add one or two drops of nitric… … Set the evaporating dish on a stove, or use any other mode of heating, so as to bring the solution to the boiling point When the heat begins to act on the bath, it will turn pink, brown, dark brown, and, as it approaches the boiling point, it will become quite black. It is better to let it boil a…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
