6 1/2 c. sugar
2 1/2 c. water
1 bottle liquid pectin
3 (6 oz.) cans frozen concentrated grape juice

Stir the sugar into the water. Place on high heat and, stirring constantly, bring quickly to a full rolling boil that cannot be stirred down. Boil hard for 1 minute. Remove from heat. Stir in the pectin. Add thawed concentrated grape juice and mix well. Pour immediately into sterilized hot container and seal.