what is Alum used for pickling
Alum powder, usually found amongst spices at grocery stores, is used in pickling recipes as a preservative, to maintain crispness, and as an ingredient in some play dough recipes.It is also commonly recommended as a home remedy or pain relief for canker sores.f good quality produce and modern canning methods are employed, there is no need to use alum to bolster the crispness of the pickles and cherries. In any event, even if alum is used to soak the pickles, it should not be used in the final pickling liquid.