The Dictionary Of Photography

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

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Toning
Chloride of gold ............      4 grs.
Uranium nitrate ...ยป ...... ...      4 ..
Chloride of sodium (salt) ... ... ...    60 ..
Acetate of sodium *...........    60 ..
Distilled water ............    32 ozs.
Neutralise the gold and uranium, previously dissolved in a little water, with bicarbonate of soda. The prints should be rather deeply printed, and washed free from silver, and then toned. This bath gives fine blacks, and with plain or matt-surfaced paper the results can hardly be told from bromide prints. The follow-ing is the best fixing bath for this, and the prints should be washed in salt and water after toning: -
Hyposulphite of soda ... ... .., 2 ozs.
Salt ... ............... 1 oz.
Bicarbonate of soda            ...... ... ..
Water           ...... ... ...... 1 pint.
Uranium may also be added to any of the ordinary gold toning baths in use. Thus far the author has given formulae for toning baths which he has tried, and can speak from personal experi-ence. The following were baths in use some twenty or thirty years back, and some were much approved of. The author regrets, however, that he has not had time to experiment with them : -
15. Lead and Gold Bath.
Nitrate of lead ............30 grs.
Chloride of sodium (salt)........, 40 ..
Hyposulphite of soda         .........240 ,,
Chloride of gold ............ 1 gr.
Distilled water ............ 10 ozs.
Mix in warm water. Use at once. Bath won't keep. Gives rich blacks. Fix in fresh hypo. Permanency of tones not guaranteed.
16. Bromide Bath.
Chloride of gold............ 1 gr.
Carbonate of soda............ 15 grs.
Sodium bromide ............ gr.
Distilled water ............ 10 ozs.
Use at once. Won't keep. Gives rich brown or chocolate tones. The more bromide is added the redder the tone.
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