EVERY photographer is, no doubt, to his own sorrow, familiar with a yellow stain in the negative, caused by taking the plate from the fixing bath before it is thoroughly fixed. Mr. Belitski, the well-known photo-chemist, made some experiments recently to remove this stain, and succeeded very well. A slight stain can often be removed by placing the negative in the following solution: 50 parts alum, 1000 parts water, 10 parts bichromate of potassium, 20 parts muriatic acid. After several minutes the negative turns yellow all through. It is washed now very thoroughly, exposed to sunlight for several minutes, and developed or blackened with the ordinary iron developer. When the stain is very intense this remedy will not prove to be of any avail, and only by leaving it for twenty-four hours in the Lainer acid fixing bath (so often described in all journals recently) he succeeded in removing the stain and saving a valuable negative.--_Deutsche Photographen Zeitung._
THE article on “Fixing Plates” which appeared in our June number, page 163 should read in the heading “Fixing Prints.” Our readers have doubtless discovered this for themselves before now.
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1. Silently corrected typographical errors and variations in spelling. 2. Retained anachronistic, non-standard, and uncertain spellings as printed. 3. Enclosed italics font in _underscores_.
End of the Project Gutenberg EBook of The American Journal of Photography, Vol. XI, No. 7, July 1890, by Various