And filtered, and neutralized with powdered chalk and a little milk of lime; the precipitate of calcium citrate so obtained is decomposed with dilute sulphuric acid, the solution filtered, evaporated to remove calcium sulphate and concentrated, preferably in vacuum pans. [Please select]
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Green Iron ammonium citrate 150 gr. [Please select]
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Expose under magnesium light and develop with a citrate oxalic developer, or in the following hydroquinone developer: Hydroquinone. [Please select]
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