Whats a SNAP lid?
A SNAP lid comes in 2 pieces. First there’s a flat lid with a thin rubber collar on one side. This rubber collar seals the lid against the glass of the mason jar. The second part is a collar that’s only used to hold the flat lid against the jar while “processing” (see below) the jar. It should only ever be finger-tip tight and can be removed once the jar has been sealed and allowed to sit for 24-hours. How high acid canning works The boiling water method, also called high acid canning, is used to preserve food with a pH of 4.6 or lower. Some recipes using low acid foods require higher temperatures than are possible with just a pot of boiling water to preserve the food and therefore need a pressure cooker. But that’s a different node. If the food has a pH higher than 4.6 then additional acid is added in the form of a brine to lower the pH. The boiling water method uses boiling water (duh) to heat the contents of a mason jar and sterilize the jar and it’s contents. While the mixture in t
