L. W. Brownell

“ When pouring on the developer, care must be taken that it immediately covers all parts of the plate, or else there will be a distinct line across the negative at that point where the developer ceased to flow. Also the tray must be constantly rocked during the process of development, for, usually, if a plate is allowed to lie still in a flat tray, the finished negatives will have a mottled appearance which will show in the print.
Too strong a light on any plate during development will fog it. ”

“ Old developer that has become discolored by repeated use should be thrown away, for its action is not perfect and it is liable to stain the plates. When we find that our developer is working slowly it should be thrown out and new mixed, for developers are cheap and it does not do to risk spoiling a negative with old developer in order to save a few cents.
Tank development is often most successful and, where one is busy, is a most excellent method, as the negatives do not have to be constantly watched, and fifteen or twenty may be developed at the same time. ”

“ Of course, the slow plates can stand the strongest light, but the orthochromatic plates should be developed with almost no light, it being turned on only occasionally for an instant to ascertain if the development is completed. ”