43 minutes ago, gfweb said:I thought that cure penetration was about a cm/day.
Depends on the curing method, cut of meat, muscle fiber orientation, temperature, etcetera
With salt box style curing, you're basically exposing the outer parts of the meat to a high concentration of salt - for a relatively short period of time - that will later equalize throughout the meat.
One of the major problems with that method is it's unpredictability, it's very easy to over-cure/over-salt - especially small cuts.
The Marianski's do a good job of describing some of the particulars here.