Pickling vinegar acts as a preservative because it makes the environment too acidic to support microorganisms. So mould doesn't grow because it's too acidic.
add hot sauce and sugar it works every time
Acid pickling means pickle the acid.
pickling
Pickling salt is the recommended type of salt for pickling vegetables, as it does not contain any additives like iodine or anti-caking agents that can affect the pickling process.
The main difference between salt and pickling salt is that pickling salt is a pure form of salt without any additives like iodine or anti-caking agents. This makes pickling salt ideal for preserving foods through the pickling process, as it won't affect the color or taste of the final product.
Certain varieties of cucumbers have been bred specifically for use in pickling. By using these varieties, the home pickling enthusiast will end up with a crisper and more flavorful result. If growing cucumbers at home, be sure to select seeds that are labeled as "pickling" or "good for pickling" on the seed packet. Good choices for pickling cucumbers include: Pioneer, National Pickling, Saladin, Bush Pickling Liberty Hybrid, Ballerina, Boston Pickling, and Eureka Hybrid.
Pickling lime used to be an accepted method of adding crispness to pickled cucumbers. The USDA no longer recommends use of pickling lime. Pickling lime is alkaline and must all be washed off of the cucumbers or it can result in a less acidic pickling solution. It the pickling solution is not acidic enough it can allow botulism an environment in which to grow. Botulism cases have been linked to this situation and this is the reason it is no longer recommended.
Vinegar
Microorganisms are not a good thing when it comes to pickling. Generally you want to kill off microorganisms when pickling.
Because the acid in the pickling liquor reacts with the aluminum and spoils the pickles.
The addition of vinegar and the processing times are different for pickling than for canning. Canning cooks the vegetables thoroughly whereas pickling is done from the veggie's raw state.
The recommended amount of calcium chloride to use when pickling vegetables is typically 1/8 to 1/4 teaspoon per quart of pickling liquid.