384 PHOTOGRAPHIC FACTS AND FORMULAS 
Plain Papers, Sepia-iron, 194. 
Plain Papers, Sizing, 189. 
Plain Papers, Toning, 192. 
Plate Backing, 31. 
Plates, Desensitising, 28. 
Plate Diagonals, 46. 
Plates, Hypersensitising, 26. 
Plates, Orthochromatising, 24. 
Plates, Panchromatising, 27. 
Plate speeds, 55. 
Plate Speeds, American Photo- 
graphy, 55. 
Plate Speeds, Burroughs-Well- 
come, 
Plate Speeds, Comparison, 69 
Plate Speeds, Continental, 61. 
Plate Speeds, Harvey, 55. 
Plate Speeds, Watkins, 55. 
Plate Speeds, Wynne, 55. 
Platinotype, Cold Bath, 281. 
Platinotype, Developers, 278. 
Platinotype, Hot Bath, 280. 
Platinotype, Local Develop- 
ment, 286. 
Pee Print-Out Sepia, 
90. 
Platinotype Process, 274. 
Platinotype v. Bromide, 294. 
Platinotypes, Intensifying, 287. 
Platinotypes, Restoring, 291. 
Platinotypes, Toning, 288. 
Platinotypes, Varnishing, 292. 
Platino-Uranotype, 293. 
Platinum Acid Bath, 278. 
Platinum Paper, Sizing, 274. 
Sauer Sma ue Process, 
a 
Platinum Print-Out Paper, 284. 
ee Process, Cold Bath, 
Platinum Residues, 126, 292. 
Platinum Toning, 229. 
Platinum Toning P. O. P., 180. 
Platinum & Gold Toning P. O. 
Portes: 
Playertype Process, 267. 
Poisoning, Metol, 102. 
Powder Process, 314. 
Presses for Bromoil, 310. 
Primuline Process, 320. 
Printer’s Ink Process, 265. 
Print Varnish, 154. 
Print-Out Platinum Paper, 284. 
tate ee Bromide Paper, 
Printing-Out Papers, 173. 
Printing-Out Papers, Develop- 
ing, 183 
ee Papers, Disco, 
Printing-Out Papers, Eastman 
Solio, 186. 
Sapte Papers, Printing, 
Printing-Out Papers, Toning, 
176. 
Prints, Line Drawings from, 14. 
Prints on Zinc, Direct, 358. . 
Process Pyro Developer, 111. 
Pyro; ti. 
Pyro-Acetone, 113. 
Pyro-Amidol, 93. 
Pyro-Caustic, 112. 
Pyro-Glycerine, 111. 
Pyro-Metol, 121. 
Pyro-Potash, 113. 
Pyro-Soda, 112. 
Pyro-Soda, “B: J," ite 
Pyro Tank Developers, 113. 
Pyrocatechin, 109, 
Pyrogallol, 111. 
Quick-Drying Sensitiser, 251. 
Quinone Intensifier, 138. 
Quinone Toning, 240. 
Ratio Aperture, 44. 
Red Chalk Tones, 182, 244. 
Red Tones, 178. 
Reducers, 141. 
Reducer, Ammonium Persul- 
phate, 146. 
Reducer, Belitzski’s, 141. 
Reducer, Bichromate, 142. 
Reducer, Ceric Sulphate, 143. 
Reducer, Cupric Chloride, 144. 
Reducer, Debenham’s, 141. 
Reducer, Eder’s, 144. 
