ABSTRACT
Some of the papers on today's market are unsuitable for salted paper prints. One factor is calcium carbonate buffering which fogs the paper. Hydrochloric acid is very effective in reacting with calcium carbonate and dissolving it, but it is very corrosive and it's best used outside or with adequate ventilation. This chapter suggests that citric acid retards dark reaction in salted paper. The key to deep, rich prints is: removing the calcium carbonate buffer; internally sizing with citric acid and salt; and using a double coat of silver. Gold-toned casein sized prints yield warmer and redder prints as compared to gelatin sized prints. Casein can also be toned with palladium and platinum toners. Agar agar can also be used in a two-step size and salt. The paper is also as much as one stop faster in exposure. Copper was used as an additive in salt printing, and it is not very expensive plus it is readily available.
