I usually use the skin off the pork belly when I've salted my own bacon. It'll have had 2 days salting with the bacon and a week or so in the fridge drying down on the bacon itself. It gets to the point where it's a bit too tough to slice through, so I whip it off the meat, chop it up and fry it into scratchings. Delish.There is another method of making them, which is currently in progress. Involves cutting up the rind, salting, and leaving for three days, then blasting for an hour in a really hot oven, rather than the long slow cook to dry them. Will report back in a few days with the result of the second method....