Sulfide Sepia Toner T-7a
Prepare Stock Solutions A and B as follows:
Sulfide Sepia Toner T-7a
Water at 20°C (68°F) | 2 L |
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Potassium ferricyanide (anhydrous) | 75 g |
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Potassium bromide (anhydrous) | 75 g |
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Potassium oxalate | 195 g |
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28% acetic acid* | 40 mL |
*To make approximately 28% acetic acid from glacial acetic acid, add 3 parts of glacial acetic acid to 8 parts water.
Sodium sulfide (anhydrous) | 45 g |
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Water at 20°C (68°F) | 500 mL |
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To prepare the working bleach and toner (redeveloper) solutions, mix them as follows:
Bleach Working Solution
Stock Solution A | 500 mL |
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Water at 20°C (68°F) | 500 mL |
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Toner Working Solution |
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Stock Solution B | 125 mL |
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Water at 20°C (68°F) | 375 mL |
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1.Immerse a thoroughly washed print in the bleach, and agitate until only a faint yellowish brown image remains. This will take approximately 5 to 8 minutes.
2.Rinse the print in cold running water for at least 2 minutes.
3.Immerse the print in the toning bath, and agitate until no further change occurs in the tone. This will take approximately 30 seconds.
4.Immediately rinse the print with water.
5.Treat
Wash
*Eliminate this treatment if prints were treated with a hardening fixer during processing. We recommend using a
Hardener F-5a
Stock Solution
Water at 50°C (125°F) | 600 mL |
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Sodium sulfite (anhydrous) | 75 g |
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28% acetic acid* | 235 mL |
Boric acid, crystals† | 375 g |
Potassium alum (dodecahydrated) | 75 g |
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Water at 20°C (68°F) | 1L |
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*To make approximately 28% acetic acid from glacial acetic acid, add 3 parts of glacial acetic acid to 8 parts water.
†Avoid using powdered boric acid; it does not dissolve easily.
Gold Toner T-1a
Mix the two stock solutions as follows:
Gold Toner T-21
Stock Solution A
Water at 50°C (125°F) | 4 L |
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Sodium thiosulfate, crystals | 960 g |
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Potassium persulfate | 120 g |
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Dissolve the sodium thiosulfate in the water. While stirring vigorously, add the potassium persulfate. If the mixture does not turn milky, increase the temperature. Cool to 27°C (80°F). Then slowly add the following solution, including the precipitate, while stirring. Solutions must be cool when you combine them.
Water at 20°C (68°F) | 64 mL |
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Silver nitrate, crystals* | 5 g |
Sodium chloride | 5 g |
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*Let the silver nitrate dissolve completely before you add the sodium chloride.
| Stock Solution B | |
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Water at 20°C (68°F) |
| 250 L |
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Gold chloride* |
| 1 g |
*Gold chloride is a deliquescent chemical; it will liquefy rapidly in a normal room atmosphere. Store the chemical in a tightly stoppered bottle in a dry atmosphere.
Mix the toner working solution as follows:
Toner Working Solution |
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Stock Solution A | Entire | |
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While stirring rapidly, slowly add— |
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Stock Solution B | 125 mL | |
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Let the mixed solution stand for about 8 hours before using it. During this time, a yellow precipitate will form. Pour the clear solution into another container and discard the precipitate.
Toning | 7 |
