I searched for a long time to find a way to make shelf-stable pickled jalapenos that remained crunchy after the jars were processed in a boiling water bath. I tried Pickle Crisp and I tried alum, but neither of these worked. So I finally tried a pickling lime soak, and it worked! It takes more time, but it works - the peppers stay crunchy. Follow the soaking instructions regarding the pickling lime carefully; if all the lime is not soaked off the peppers may not be acid enough for safe preservation. Also, DO NOT alter the vinegar to water ratio in the brine. Peppers are low acid to begin with, and the pickling lime soak makes them even more low acid, so you need to make sure you have a sufficiently acid brine for safe shelf-stable preservation. The preparation time includes the time needed to soak the peppers. Wear rubber gloves when working with hot peppers. If you don't you will absentmindedly rub your eyes sometime after you've been working with the peppers & you will be sorry.