Before putting the butter in the package, the package should be soaked
in water, so as to remove the taste of the wood, and then thoroughly
soaked in saturated brine, so that the wood will not draw the salt from
the butter which comes in contact with it. If it does, the butter thus
deprived of salt will turn white, have a sickish flavor, and soon turn
rancid. It is a good idea to not only sprinkle a thin layer of salt
over the bottom of the package, but to rub the moist inner sides with
dairy salt, and thus make sure that there is salt enough in contact
with the wood to prevent its absorbing the salt from the butter.