Michigan State University Extension
Preserving Food Safely - 01600829
QUANTITY: An average of 23 pounds is needed per canner load of 7 quarts, or an average of 14 pounds per canner load of 9 pints. A bushel weighs 53 pounds and yields 15 to 18 quarts of juice--an average of 3-1/4 pounds per quart.
PROCEDURE: Wash, remove stems, and trim off bruised or discolored portions. To prevent juice from separating, quickly cut about 1 pound of fruit into quarters and put directly into saucepan. Heat immediately to boiling while crushing. Continue to slowly add and crush freshly cut tomato quarters to the boiling mixture. Make sure the mixture boils constantly and vigorously while you add the remaining tomatoes. Simmer 5 minutes after adding all pieces.
IF YOU ARE NOT CONCERNED ABOUT JUICE SEPARATION, simply slice or quarter tomatoes into a large saucepan. Crush, heat, and simmer for 5 minutes before juicing.
Press both types of heated juice through a sieve or food mill to remove skins and seeds. Acidify by adding two tablespoons of bottled lemon juice or 1/2 teaspoon of citric acid per quart of tomatoes. For pints, use one tablespoon bottled lemon juice or 1/4 teaspoon citric acid. Acid can be added directly to the jars before filling with product. Add sugar to offset acid taste, if desired. Four tablespoons of a 5 percent acidity vinegar per quart may be used instead of lemon juice or citric acid. However, vinegar may cause undesirable flavor changes.
Heat juice again to boiling. Add 1 teaspoon of salt per quart to the jars, if desired. Fill hot jars with hot tomato juice, leaving 1/2-inch headspace. Adjust lids and process.
RECOMMENDED PROCESS TIMES FOR TOMATO JUICE IN A BOILING-WATER CANNER
Process Time at Altitudes of Style of Jar 0- 1001- 3001- 6001- Pack Size 1000 ft. 3000 ft. 6000 ft. 8000 ft.
Hot Pints 35 min. 40 min. 45 min. 50 min. Hot Quarts 40 45 50 55
RECOMMENDED PROCESS TIMES FOR TOMATO JUICE IN A DIAL-GAUGE PRESSURE CANNER
Canner Gauge Pressure (PSI) at Altitudes of Style of Jar Process 0- 2001- 4001- 6001- Pack Size Time 2000 ft. 4000 ft. 6000 ft. 8000 ft.
Hot Pints 20 min. 6 lb. 7 lb. 8 lb. 9 lb. Hot Quarts 15 11 12 13 14
RECOMMENDED PROCESS TIMES FOR TOMATO JUICE IN A WEIGHTED-GAUGE PRESSURE CANNER
Canner Gauge Pressure (PSI) at Altitudes of Style of Jar Process 0- Above Pack Size Time 1000 ft. 1000 ft.
Hot Pints 15 min. 10 lb. 15 lb. Hot Quarts 10 15 not recommended