This formula produces blue tones on printing papers.
Red tones may be obtained by first toning the print with Sepia Sulfide Toner 221, Bleach and Redevelopment. This process involves an intial bleaching of the print with a ferricyanide-bromide toner then redeveloping the image with a sulfide bath. The well washed print is then toned in Gold Thiocarbamide Toner (Ilford IT-5) for 15 to 45 minutes.
Unusual effects of mixed tones of blue-black shadows and soft reddish highlights can be produced by using prints which have been partially toned in a sulfide bath without initially bleaching the image. Toners to carry out this type of sulfide toning are Hypo-Alum Print Toner and Polysulfide Toner. The well washed print is then toned in Gold-Thiocarbamide Toner (Ilford IT-5).
STOCK SOLUTION A
| Chemical | Amount | Units |
|---|---|---|
| Thiourea | 14 | g |
| Water to make | 1000 | ml |
STOCK SOLUTION B
| Chemical | Amount | Units |
|---|---|---|
| Citric Acid Crystals | 14 | g |
| Water to make | 1000 | ml |
SOLUTION C
| Chemical | Amount | Units |
|---|---|---|
| Gold Chloride | 6 | g |
| Water to make | 1000 | ml |
USAGE
Take 1 part Solution A, 1 part Solution B, 1 part Solution C, and 10 parts
of water. Prints on Bromide paper should be toned from 15 to 30 minutes,
according to tone required. Keep prints moving during toning and wash
thoroughly after the desired tone is reached. Because of the length of time
necessary for the color to appear, use this formula at approximately 100°F.
NOTE
For deeper blue, substitute
14g potassium thiocyanate
for the thiocarbamide.
GOLD ON SEPIA
Tone in ordinary sepia. Wash well, then immerse the print in any of the gold
toners. The resulting color ranges from reddish-brown to brighr orange,
depending on the depth of the sepia tone and the length of immersion in the
gold bath. Prints intended for this treatment should be dark and contrasty.
Refixing is recommended.
REFERENCE
Gold-Thiocarbamide Toner, Photo-Lab-Index, Section 15, Supplement 172, p. 61.
Classic Toning Methods, Peter
Hughes (Reichelt), Mastering Black-and-White Photography, p.49.
Photochemistry Question & Answer, Robert Chapman, Refining B&W Photographs, p.63.