pH 1-14 Test Strips Universal Test Paper Litmus Paper for Soil, Water, Saliva,
Alkalinity, 12-14 indicates strong alkalinity. Acidity when the PH value is greater than 7;Neutral when the PH value is equal to 7;Alkaline when PH value is less than 7. indicates weak acidity, 7 indicates neutral, 8-11 indicates weak.