1 pound low—process at 9 pounds.
2 pounds low—process at 8 pounds.
3 pounds low—process at 7 pounds.
4 pounds low—process at 6 pounds.
It is not safe to use a canner if the dial gage registers as much as 5 pounds high or low. Replace a faulty gage with an accurate one.
Glass jars
Jars may be widemouth or regular type. Pints and quarts are satisfactory sizes for canning meats and poultry.
There are two types of jar closures:
- Flat metal lid with sealing compound and a metal screw band. This closure seals as jar cools.
- Porcelain-lined zinc cap with a shoulder rubber ring. This cap must be tightened to complete the seal immediately after meat is canned.
Be sure all jars and closures are perfect. Discard jars with cracks or chips; discard lids and bands with dents or rust. Defects prevent air-tight seals.