No. 1 or pyro solution 1 dr.
No. 2 or ammonia solution 10 oz.
This will be enough to develop three or four 8×10 plates, if they
are properly timed.
The above is one of the best forms of ammonia pyro developer; it
gives negatives of very fine quality.
Many dry plates, on development with ammonia and pyro, show a green
fog by reflected light, and a pink or red fog by transmitted light;
this fog does not materially injure the printing quality of the
plate, but spoils its appearance to the eye, and for that reason
many establishments have given up the use of ammonia and in its
place use soda or potash.