The DARKROOM COOKBOOK, Third Edition

Panchromatic paper, and safelights, 11
Paper coating
with brush, 149
with colloido-chloride emulsion, 156
Paper developers
amidol, 261–263
brown-black, 258
brown-tone, 255
characteristics, 243–244
charcoal black, 251
direct brown-black, 256
red-brown, 260
soft-portrait, 249
soft-working, 248
special warm-tone, 253
Weston amidol developers, 264–265
Paper fl oating, in print out processes, 149
Paper intensifi ers, formulas, 308–309
Papers
bromide, 80
collodion, 152
David Lewis Bromoil Paper, 83
fi xing, 107, 108
panchromatic, 11
printing papers, 10–11, 14, 28, 321–322
salting, 151
types, 77
Paper salting, in print out processes, 148
Paper selection, in print out processes, 148
Paper sensitization, in print out processes,
148
Para-aminophenol hydrochloride, properties and
uses, 184–185
Para-aminophenol sulfate, see Metol
Paraformaldehyde, properties and uses, 185
Para-hydroxyphenyl glycin, see Glycin
Para-phenylenediamine (ppd)
as developing agent, 46–47
properties and uses, 185
Para-phenylenediamine hydrochloride, properties
and uses, 185–186
Patton, Chris, 215, 251
PCTEA, sulfi te-free developers, 30
Pelouze R-47 scale, 16–17
Penthydrate, defi nition, 169
Percentage solutions, chemical preparation, 167
pH, developing agents, 22–24
Phenidone
as developing agent, 20
Index 353
properties and uses, 186
and sodium bisulfi te, 22
sulfi te-free developers, 30
Phenidone and Quinol (PQ)
benzotriazole, 26
and cold tones, 244
vs. MQ developers, 73
solution considerations, 27
and superadditivity, 21
Phenosafranine, development by inspection,
136
Phosphates, developing agents, 25
Photographic chemicals, properties, 170–196
Photo Maskoid®, 117
Pinakryptol Green, development by inspection,
136
Pinasafrol, development by inspection, 136
Pitman Arm, 133
Plain fi xers, characteristics, 105
Plain hypo fi xer, formula, 273
PMHQ, formula, 233–234
PMK
formula, 234–235
formula history, 66
Polysulfi de toner, formula, 285
Polytoner, for split toning, 121
P.O.P., see Printing out processes (P.O.P.)
Portrait developers, formula, 257
Post-fl ashing, for contrast control, 94–95
POTA, formula, 223
Potassa sulfurated, properties and uses,
186–187
Potassium alum, properties and uses, 175
Potassium bichromate, properties and uses, 187
Potassium bromide
properties and uses, 187
restrainers, 26
Potassium carbonate
developing agents, 25
properties and uses, 187
Potassium chloride, properties and uses, 188
Potassium chrome alum, properties and uses,
174
Potassium citrate, properties and uses, 188
Potassium ferricyanide
properties and uses, 188
toners, 113
Potassium ferrocyanide, properties and uses,
188