Purchase a head of red-purple cabbage. Cut up small pieces so that approximately a cupful of chopped leaves is obtained. Pour in enough water to cover the leaves and boil until the leaves turn colorless. Decant the purple liquid and store the liquid in a refrigerator for use.
Iowa Science Teachers Journal
© Copyright 1979 by the Iowa Academy of Science
"Poorman's Litmus Paper,"
Iowa Science Teachers Journal: Vol. 16
, Article 26.
Available at: https://scholarworks.uni.edu/istj/vol16/iss2/26