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.
796 We do not advocate this developer in preference to those that may be prepared from our published formulae, if good chemicals are used; but for those who do not wish to make up stock solutions, or when going on a trip they wish to carry the developer in a form that shall not cause damage to other goods in case of breakage, this is just the developer that will fill the bill for this purpose, as a trial will convince you. There are none better and we have found none as good (in this class).
Negatives. Negatives suitable for all the different printing processes - carbon, platinum, albumen, collodion, gelatine, etc., - may be successfully and easily made on the Hammer Plates by a slight modification of the developing solutions.
Washing After Development. In all cases it is desirable to wash the plate for at least two minutes before fixing it.
Fixing. The plain fixing bath is a solution of hyposulphite of soda, of a strength of about five (5) or six (6) ounces to the pint of water. A fully saturated solution diluted with an equal quantity of water is of about this strength. The plate should be left in the fixing bath for several minutes after it appears to be cleared; as long as it took to fix would not be too much. Neglect of this precaution may lead to the formation of insoluble compounds in the film, which, although not visible at first, may in time result in stains or even total decay of the negative. Commercial hypo-sulphite of soda usually contains foreign matter, which, if allowed to remain in the solution, will cause spots on the negative. Filter before use. If the regular fixing bath is too strong and not stirred before use, it will at times cause parallel lines on the negatives that were fixed in grooved fixing boxes.
A cool fixing bath can be prepared by dissolving a fresh lot of hypo for each batch of plates. This is of benefit during the hot weather.
............. 3 drams
Sulphite of Soda..............
............. 4 ounces
When dissolved, add:
Hypo- sulphite of soda
Water to make...............