This particular paper has a good balance of range with accuracy, pH 5.5 to 8.0 every .2 to .3 pH intervals. This Hydrion product, commonly requested to test urine and saliva has excellent color separations in the acid range, below pH 7, and the alkali range above pH7, which is sometimes not the case with other papers.
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, and 8.0
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