In the 50s and onward, Run Salt (RS) emulsions became the norm and resulted in very straight line curves but high contrast. These emulsions were made by running Silver Nitrate and a separate salt solution into a solution of salt and gelatin. Since the resultant mixture stayed at the same approximate salt concentration from start to finish, the grains were very similar in size and shape. The emulsions made this way were monodisperse. QUOTE]
Do you have a RS formula we could try out?
I assume the silver and halide solutions should be made to the same molar concentration for this? How much excess halide should be with the gelatin? The excess halide is there to make sure there is never an excess of silver in the pot, right?