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THE DEVELOPING MACHINE
Specifications and Reversal Processing Speeds for Houston Model 22 Developing Machine
Specifications
Tank No.
Function Gallons
Ft in
tank
Tank No.
Function
Gallons
Ft in
tank
1 Loading
elevator Dry
2 First de
veloper 9
3 Wash 4.5
4 Bleach 9
5 Wash 4.5
Total machine leader
20
26 52 26
Clear
4.5
505 ft.
26
7 7
Second
developer
9
52
8
Stop bath
4.5
26
9
Hypo
4.5
26
10
Wash dry
Running
box
water
52
Reversal Processing Speeds
Film
Ft per
niin.
machine
speed
Film speed rating*
Film
v;,r i ,
speed
Dupont 301 8 50
Eastman XX 8 100
Ansco Tri-SS 8 100
Dupont 324 20 32
Ansco Hypan 20 32
Eastman Panatomic 20 32
'Dupont 314 -2:> 32
Eastman Super-X 25 32
Dupont 330 32 32
\<>t> : Developer formulas suitable for the various typos are found in the operating instructions for the machines.
a When developed as recommended.
(1) A feed reel — where the film to be developed is placed on the feed hub of the machine.
{2) An " elevator" — where the length of the film loop between the feed reel and the developing tank is permitted to diminish when the feed reel is stopped for the purpose of putting on the next roll of film, the speed of the machine proper remaining constant so that developing time may remain constant. The length of the loop of film in the elevator decreases when the feed reel is stopped for reloading; it increases a predetermined amount at a predetermined rate when the feed reel is permitted to rotate again after loading, and runs at constant speed with the loop length unchanged after the predetermined loop length has been attained.