5 lbs. plums, crushed (about 4 1/2 qts.)
1 c. water
6 c. sugar
1/2 bottle (6 oz.) pectin

Heat plums and water to boiling point in Dutch oven; reduce heat. Cover and simmer 10 minutes. Strain hot; do not press pulp through strainer. Strain juice through 2 thicknesses of cheesecloth.

Mix 3 cups plum juice and sugar. Heat; stir constantly. Bring to a full rolling boil. Add pectin; heat to full rolling boil. Boil 1 minute. Skim off foam; pour into hot sterilized jars. Leave 1/2 inch from top and seal.