For what it's worth, i used a "brine" (salt solution) for curing buffalo capes whilst working in my tropical camp, Northern Australia.
For a brine to work it needs to be at, or beyond, total saturation point of salt per liter of water being used. To get to this point i would continue to mix the salt in the water until it wouldn't dissolve any more.
Another useful point that seemed to help the brine was that after a thorough fleshing and splitting of the hides we would wash the flesh, and fur, sides with a water washer.
High pressure jetting would expose the hair folicals and prepare them to recieve the brine.
Many times, when a bull was shot late on a particular day, we would treat the cape as described above and leave them in the brine overnight and salt them the following day.
Never lost one and in fact the brine seemed to help cure the hides quicker and take less salt than ones not treated as such.
For what it's worth.