332 PHOTOGRAPHIC FACTS AND FORMULAS 
Sodium carbonate 
Potassium bromide 
Citric acid 
Water 
Extreme Density Developer. Hammer Plates.— 
Hydrochinon 
Sodium sulphite 
Sodium carbonate 
Potassium bromide 
Water 
Use full strength at 65° F. 
Seed Lantern, Black Tone Transparency Plates. — 
A. Elon (metol) 
Hydrochinon 
Sodium sulphite, dry 
Water 
B. Potassium bromide 
Sodium carbonate, dry 
Water 
For use mix in equal volumes. 
78g 24 0z 
2¢g 30 gr 
2g 30 gr 
1000 ccm 3202 
i258 V4 Oz. 
100 g 2 az 
150 ¢ 302: 
6.252 Y oz. 
1000 ccm 20 oz. 
4g 30 gr. 
4¢ 30 gr. 
I7g 130 gr. 
1000 ccm 16 oz. 
2g 15 gr. 
13 g 100 gr. 
1000 ccm 16 oz. 
Temperature about 70° F. 
Seed Hydrochinon Developer for Warm Tones.— 
A. Hydrochinon 
Sodium sulphite, dry 
Potassium bromide 
Citric acid 
Water 
B. Sodium carbonate, dry 
Caustic soda 
Water 
For use mix in equal volumes. 
more B. 
6.5 g 50 gr. 
26¢ 20 gr. 
0.65 g 5 of. 
0.65 g 5 gr. 
1000 ccm 16 oz. 
$1.25 ¢ Y, oz. 
3.9¢ 30 gr. 
1000 ccm 16 oz. 
For still warmer tones use 
Cramer's Hydrochinon-P yrocatechin Developer.— 
A. Sodium sulphite, dry 
180 g 6 oz. 
