What methods of canning and equipment are not recommended?
Some of these canning methods and equipment used to be popular but they are no longer thought to be safe: • Open kettle canning. • Processing freshly filled jars in conventional ovens, microwave ovens and dishwashers. • Steam canners. • Jars with wire bails and glass caps. Use only glass or metal jars with self-sealing lids. • Paraffin wax sealing. • Zinc porcelain lined caps. • While you many reuse canning jars, you should always use a new lid. • Do not use commercial jars such as those for mayonnaise or salad dressings as they are not designed for home canning.
