Kodak Printer Accessories manual Sulfide Sepia Toner T-7a, Gold Toner T-1a

Sulfide Sepia Toner T-7a

Prepare Stock Solutions A and B as follows:

Sulfide Sepia Toner T-7a

Bleach—Stock Solution A

Water at 20°C (68°F)	2 L
Potassium ferricyanide (anhydrous)	75 g
Potassium bromide (anhydrous)	75 g
Potassium oxalate	195 g
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.

Toner—Stock Solution B

Sodium sulfide (anhydrous)	45 g
Water at 20°C (68°F)	500 mL

To prepare the working bleach and toner (redeveloper) solutions, mix them as follows:

Bleach Working Solution

Stock Solution A	500 mL
Water at 20°C (68°F)	500 mL
Toner Working Solution
Stock Solution B	125 mL
Water at 20°C (68°F)	375 mL

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 fiber-base prints in a bath made from 1 part KODAK Liquid Hardener and 13 parts water (or 2 parts Hardener F-5a and 16 parts water) for 2 to 5 minutes.**

Wash fiber-base prints in running water at 18 to 24°C (65 to 75°F) for 30 minutes; wash resin-coated prints for 4 minutes.

*Eliminate this treatment if prints were treated with a hardening fixer during processing. We recommend using a non-hardening fixer such as KODAK PROFESSIONAL Rapid Fixer Part A only for prints that you plan to tone.

Hardener F-5a

Stock Solution

Water at 50°C (125°F)	600 mL
Sodium sulfite (anhydrous)	75 g
28% acetic acid*	235 mL
Boric acid, crystals†	375 g
Potassium alum (dodecahydrated)	75 g
Water at 20°C (68°F)	1L

*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
Sodium thiosulfate, crystals	960 g
Potassium persulfate	120 g

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
Silver nitrate, crystals*	5 g
Sodium chloride	5 g

*Let the silver nitrate dissolve completely before you add the sodium chloride.

	Stock Solution B
Water at 20°C (68°F)		250 L
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
Stock Solution A	Entire
	amount
While stirring rapidly, slowly add—
Stock Solution B	125 mL

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 Black-and-White Materials • G-23 7