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. Liquid lost from jars during processing is caused by: (1) Packing jar too solidly or overfilling; (2) Too high a temperature or too high pressure; (3) Variation or sudden lowering of temperature in the canner. When processing food, pressure regulator should not be taken off the vent pipe and cover should not be removed until air vent/cover lock has dropped and pressure has been completely reduced; (4) Failure to adjust jar lids according to manufacturer’s directions. . The loss of liquid from