This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
Caution. Bear in mind negatives for fuzzy prints should be slightly over-exposed and developed for flatness rather than contrast. Start these in normal developer, and if they are well timed and show a tendency to fog or go a little flat, transfer to a tray of old developer.
663. You will rarely need to use bromide for such negatives, but if they are much over-timed a few drops may be added to your tray of old developer.
664. Carry these over-timed negatives to a good strength, even to over-developing, as the development of no plate should be stopped until the plate shows contrast sufficient to produce the quality of print you have in view.
665. If, after fixing, you find your plate too thick and dense, reduce with persulphate of ammonia, which, as it acts upon the highlights principally, will not increase the contrast of your plate, but slightly soften it. As softness is one chief essential for fuzzy pictures always use persulphate in reducing such plates, following instructions on Reducing in Volume II.