This formula produces blue tones on print papers. A blue-green tone may be obtained by toning the well washed blue toned print in a sulfide bath.
A split tone effect with deep blue shadows and brown highlights may be obtained by first toning in sulfur-based toner such as Hypo-Alum Sepia, brown, or Polysulfide Paper Toner (Kodak T-8), followed by an iron toner such as Blue Toner (GT-14).
SOLUTION A
| Chemical | Amount | Units |
|---|---|---|
| Ferric Ammonium Citrate | 5.6 | g |
| Water to make | 56.7 | ml |
SOLUTION B
| Chemical | Amount | Units |
|---|---|---|
| Potassium Ferricyanide | 5.6 | g |
| Water to make | 56.7 | ml |
SOLUTION C
| Chemical | Amount | Units |
|---|---|---|
| Acetic Acid (28%) | 227.3 | ml |
| Water to make | 341.0 | ml |
USAGE
Mix the three solutions together. Soak prints until the image becomes
bright blue. After toning, wash in clear water until the highlights are clear.
NOTE
Before using toning baths it is essential that the prints be well washed.
It will be found that a given formula will not produce an identical tone on all
papers; as a rule the commercial type bromide and chloride papers respond
better to toning than do the more specialized emulsions. The majority of toning
formulas exert a bleaching action in addition to creating the change of color,
and for that reason prints to be toned should be made considerably deeper than
normal.
REFERENCE
Blue Toner (GT-14), Photo-Lab-Index, Section 15, Supplement 173, p. 66.