. The book of photography; practical, theoretical and applied. Printsmay, however, sometimes be toned in amixture of gold and uranium with somesuccess. The formula used is : Chloride of GoldUranium NitrafoSodium AcetateCommon SaltWater 1 ST. oz. Pleasing dark tones are obtainable, butthe image loses considerably in toning does not appear to offerany advantages over the usual and moreaccessible substances. The following for-mula has, however, been experimentedwith: Cliloro-palladimte of . 2 grs. Citric Acid 20 grs. Water . . .10 oz. 20 grains of
. The book of photography; practical, theoretical and applied. Printsmay, however, sometimes be toned in amixture of gold and uranium with somesuccess. The formula used is : Chloride of GoldUranium NitrafoSodium AcetateCommon SaltWater 1 ST. oz. Pleasing dark tones are obtainable, butthe image loses considerably in toning does not appear to offerany advantages over the usual and moreaccessible substances. The following for-mula has, however, been experimentedwith: Cliloro-palladimte of . 2 grs. Citric Acid 20 grs. Water . . .10 oz. 20 grains of common salt may be added,if desired, but it does not appear toaffect the result materially. The ad-dition of common salt to platinum andother toning baths has been many timessuggested. It certainly offers the advan-tage of ensuring the conversion of anyfree silver remaining in the paper, andpreventing its combination with the plati-num or other salt, but it appears toretard the toning action seriously, and, in ifact, in some cases stops it
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
