User manual

minutes the operator will be able to distinguish ~bjects in the picture. The
d~veloper should be allowed to act 5 to 10 minutes. The progress of the devel-
opment may be watched by holding the negative, from time to time, up to
the lamp.
O. Transfer the developed film to the third tray and nnse two or three times with
water, leaving
it to soak while the next film is being developed.
Eight or ten negatives can be developed one after the other in one portion of developer; then it should '
be thrown away and a fresh portion mixed.
Only one negative should be de ' veloped at a time, until tbe operator becomes expert, then he can
manage three or four in the tray at one time and the developer will answer for twenty-four films
before being exhausted. '
As each successive negative is developed it should be put, with the preceding negatives, in the washing
tray and the water changed twice, to prevent the developer remaining in the film from staining them.
7. Put two tablespoonfuls of the Hyposulphite of Soda into the fourth tray, fill two-
thirds full of water, and stir until dissolved. This is called the fixing bath.
8. immerse the negatives one by one in the fixing bath until they are entirely
clear of white spots and are transparent instead of milky by transmitted light.
This will require about 10 minutes.
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