322 PHOTOGRAPHIC FACTS AND FORMULAS 
The primuline process was patented by Green, Cross and 
Bevan. The process is as follows: 
Primuline 33 g 253.2" 
Hot water 1000 ccm 16 oz. 
Filter and immerse the fabric in the warm solution for about 
10 minutes, wash thoroughly, and immerse for 5 minutes in: 
Sodium nitrite (not nitrate) 6.6¢ 51 er, 
Hydrochloric acid 15 ccm 115 min. 
Water 1000 ccm 16 oz. 
Dry in the dark. Exposure must be made under a positive, 
if a positive print is required. Then the print is thoroughly 
washed, and treated with one of the following developers. 
For red tones: 
Beta-naphthol 10¢g 77 gr. 
Caustic soda l3¢ 100 gr. 
Water 1000 ccm 16 oz. 
For orange tones: 
Resorcine 2.5¢ 19 gr. 
Caustic soda llg 84 er. 
Water 1000 ccm 16 oz. 
For purple: 
Alpha-naphthylamine 20g 154 er. 
Hydrochloric acid 3 ccm 23 min. 
Water 1000 ccm 16 oz. 
For blacks: 
Eikonogen l3¢g 100 gr. 
Water 1000 ccm 16 oz. 
For brown: 
Pyrogallol I2¢ 92 gr. 
Water 1000 ccm 16 oz. 
The prints must be well washed after development, and if 
on fabric ironed before quite dry. Unfortunately, it is almost 
impossible to obtain pure whites by this process. 
