Gold toning

Sawada H, Esaki M. Use of nanogold followed by silver enhancement and gold toning for postembedding immunolocalization in osmium-fixed, Epon-embedded tissues. J Electron Microsc 1994 43 361-366. 

If you intend to gold-tone a print for blue tones, do not add too much carbonate solution as it will make it difficult to secure a brilliant blue with gold chloride toner. 

There are three ways to achieve cold tones. The first is through direct development of bromide paper. The second is through the gold-toning of a warm-tone chlorobromide paper. The third method is immersion in a blue-toning bath (Formulas Toners, Ansco 241 Iron Blue Toner). 

Wash thoroughly before gold toning. Any appreciable hypo left in the print will create a yellow-brown stain, or the toning will take a long time and not be very good. 

The 6-T system consists of three separate bleaches, three separate toners, a sodium chloride solution, plus a gold-tone modifier. By mixing and matching the various bleaches and toners, and throwing in the chloride bath and/or the modifier, a large variety of tones can be achieved from purplish-brown to a bright sunlit sepia. This system works best with old-style soft emulsion papers. (Formulas Toners DuPont 6-TToning System)... 

As a rule, acid toners, such as PO P. Borax Toning Bath, act slowly and tend to be warm alkaline toners, such as P.O.P. Thiocyanate Toning Bath, act more quickly and tend to be cool, or blue. If gold toning is intended, trim the darkened edges from around the print so that you don t waste gold solution. 

Camera Obscured, 2001. Mark Osterman. Courtesy of the Tilt Gallery. Gold-toned albumen print from collodion negative, 8 X 10 inches. 

Paper Wasp Extraction, 2001. 2008 Mark Osterman. All rights reserved. Courtesy Tilt Gallery. Gold-toned salt print from collodion negative, 10x8 inches. 

Uses As a mild alkali accelerator in fine-grain developers and those of low activity in certain hardening fixing baths and in some acid hardeners, especially those intended for prints that are to be dried through heated belt driers and in gold toning baths to render them alkaline and to increase the rate of deposition of gold. 

Uses In hypo baths for fixing self-toning papers in gold toning baths in developers to nhibit fog. 

Uses Gold toning silver chloride emulsions. 

Uses In gold toning baths clearing yellow stains from prints in mordant solutions for dye toning. 

A print toned in hot hypo-alum may be further toned to a rich crimson by gold toning. 

T-2 can be used instead of 6T-3 for a cooler color. Gold tone modifier ... 

If a slight yellowish stain appears on the gold-toned print, it may be cleared with a second treatment in any non-hardening fixing bath. Thorough washing should follow. 

When modified, the 6T-3 toners produce less purple colors than the 6T-1 toners. All gold tone modified prints change color somewhat on drying and this cannot be avoided. The color descriptions given above apply to the dried prints. 

Fisher RS, Levine MS, Sibley DR, Ariano MA. 1994. D2 dopamine receptor protein location Golgi impregnation-gold toned and ultrastructural analysis of the rat neostriatum. J Neurosci Res 38 551-564. 

Figure 4 All Golds tone diagrams for the third order ring energy, including those in which the spin labels differ. Taken from S. Wilson, Comput. Phys. Commun. 14, 91 (1978)...

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