The book Practical Photography volume 8 was written by author R Roger Child Bayley Here you can read free online of Practical Photography volume 8 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Practical Photography volume 8 a good or bad book?
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Metol \ oz. Potassium metabisulphite 120 gr. Pyro 275 gr. Water to make 29 oz. Sodium sulphite, anhydrous 3 oz. Sodium carbonate, anhydrous 2 oz. For use as a 20-minute developer for speed films and film packs, at 65 degrees F. , take 1 oz. Of each and 22 oz. Of water. The developer for tank development may be very dilute, so that the process of development, instead of taking a few minutes, may last from one to ten hours. The time of development may be regulated by the dilution of the developer... used. The developer can be made so weak as to take all day or all night for develop- ment if desired; but if this is done, the proper developer to use is glycin. In fact, many people think this the best developer for tank development. It certainly gives excellent results. A suitable formula is: Water 1 oz. Sodium carbonate, anhydrous 1 gr. Sodium sulphite, anhydrous 1 gr. Glycin 1 gr. THE ELEMENTS OF PHOTOGRAPHY 33 Any desired quantity may be made up in these proportions. Thermo Development. — Mr.
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