The DARKROOM COOKBOOK, Third Edition

Normal exposure should be determined by fi rst using Ilford ID-78 (next formula).
FORMULA #99
Ilford ID-78 (1960)
Formulas 259
*Additonal 10% Approximate
Dilution of Potassium Development
Color Exposure Developer Bromide Time
Warm-black Normal Full strength None 1½ minutes
Sepia 2� normal 5� 1.0 ml 5 minutes
Brown sepia 3� normal 10� 3.0 ml 10 minutes
Red-brown 4� normal 15� 5.0 ml 15 minutes
Red 5� normal 20� 6.0 ml 20 minutes
(Thanks to Ian Grant)
PQ developer for warm-black tones
ID-78 is a modern PQ warm tone developer which is very close in its formula to Ilford Neutol
WA®. It works extremely well with modern papers.
Water at 125F/52C, 750.0 ml
Sodium sulfi te, 50.0 g
Hydroquinone 12.0 g
Phenidone, 0.5 g
Sodium carbonate, 62.0 g
Potassium bromide, 4.5 g
Water to make 1.0 liter
Dilute 1:1 or 1:3.
NOTE 1: This formula is often incorrectly published showing only 0.4 grams of potassium
bromide. The correct formula was published by Ilford when it was introduced in 1960, and in
1966 by L.F.A. Mason, the head of research at Ilford, in Photographic Processing Chemistry,
Focal Press.
NOTE 2: If a stock solution is made up with no bromide or benzotriazole it can be varied
from a cold/blue black developer to a warm-tone developer with the addition of benzotriazole
or bromide.
FORMULA #100
Kodak D-52
This formula is similar to the proprietary formula Kodak Selectol.
Water at 125F/52C, 500.0 ml
Metol, 1.5 g
Sodium sulfi te, 22.5 g
Hydroquinone, 6.0 g
Sodium carbonate, monohydrate, 17.0 g
Potassium bromide, 1.5 g
Water to make 1.0 liter