n JWR's book "How to Survive the End of the World as We Know It" , item number 11 on the Bartering and Charity List is "50 pound sacks of lime (for outhouses"). My first thought on reading this was, “Why would I barter away my precious lime?” More than just an odor eliminator, lime is a very helpful material used for countless applications in its various forms across various industries ranging from use in the production of glass to use as a calcium supplement in Tropicana brand orange juice.

My initial research was designed to discover which type of lime would be best to buy in bulk, based on its price and versatility in regard to survival needs. Ultimately my research has provided more questions than answers, more starting points for more research projects rather than full-fledged answers. However, I do believe that the common uses I have discovered at this point provide a comprehensive springboard which can serve as starting points for future research for all long-term preparation.

The most important thing to distinguish when acquiring lime is the type of lime and storage capacities based on your targeted use of the product. Besides the lime fruit, which will not be discussed in this article, “lime” generally refers to three types of limestone-derived materials: Limestone, Quicklime, and Hydrated Lime. It is important to explore the different uses of each type of lime and its availability in order to plan accordingly.

Furthermore, it is important to note that the chemicals come in different grades as recognized by the FDA: Pharmaceutical (Pharma), Food, Feed, and Industrial/Technical, with pharmaceutical and food grade being safe for human consumption.