The Dictionary Of Photography

A True Historic Record Of The Art & Practice Of Photography 100 Years Ago.

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Toning
preserving any alkaline toning bath is, after use, to add sufficient hydrochloric acid to make the bath distinctly acid and of a yellow colour. When required for use, it is only necessary to add sufficient alkali to render the bath colourless, and it will work as well as a fresh-made one. All toning baths should be distinctly alkaline ; and if not so, alkali should be added.
All amateurs will hail with welcome a bath which will tone albumen prints, no matter how long they have been printed, or how faded and yellow they may be. The following is the pro-cess invented by M. Jaudaurek of Vienna, which is of great value : -
Solution A.
Distilled water ............ 17 ozs.
Tungstate of soda............154 grs.
Solution B. Carbonate of lime (chemical, pure) ... 60 grs. Chloride of lime ............ 15 ..
N        ft gold      ............6o N
Distilled water ............ 15 ozs.
This solution should be made in a yellow glass bottle, well shaken and allowred to stand for twenty-four hours : then filtered into another yellow glass bottle, and kept well stoppered. When the prints have been washed, they should be placed one by one is the following toning bath : -
Solution A ...... ......... 5 ozs.
.. B............ 70140 m.
They should not tone too quickly ; about ten minutes in summer should be the shortest time. If they tone quicker than this reduce the quantity of solution B. After toning wash the prints and place in the -
Fixing Bath.
Solution A.......... ...... 5 ozs.
Sodium Hyposulphite .........230 grs.
They should be allowed to remain in this till the yellow colour has quite disappeared, which may take some hours. After this has disappeared wash in the usual way. (For Ui-aniimi Toning and Copper Ferricyanide To?iingi see Bromide Paper.) 1                                  626