Hydrion pH Paper provides excellent color separation in both the acid range (below pH 7) and the alkali range (above pH 7). Commonly used to test urine and saliva, it offers an easy to read, single color match at every .2 to .3 interval from pH 5.5-8.0. Simply tear off a small strip of pH paper, dip into the test solution, then instantly compare the resulting color with the matching pH color chart. The color chart has pH matches at [5.5][5.8][6.0][6.2][6.4][6.6][7.0][7.2][7.4][7.6][8.0] Each roll provides for approximately 100 tests. Per each; 10 Packs/Case.