2 oz. citric acid (available in pharmacy)
2 qt. boiling water
6 - 7 c. sugar
4 qt. cold water
1 large can pineapple juice
1 large can frozen orange juice

Dissolve citric acid in the boiling water. Mix remaining ingredients together.

To add foam to the punch, add sherbet (such as pineapple, orange, or lime) at serving time.