It's just brains and water, nothing too complicated.
Just make sure not to use brains that are to scrambled
or filled with blood. It will ruin your hide.
Most hides you want to soak if you're trying to take
the hair out. For smaller hides if you just want to dry
them out, regular table salt works fine. Salt it thoroughly,
and as it leeches keep covering with more salt until the
leeching stops. It's not hard at all, my daughter just
did "Bunny Foo Foo" the other day with iodized salt.