PH Indicator Paper Universal pH 2.0 to 10.5 have been developed with a mixture of several indicators which on contact with the sample solution assume a particular color. A check against the color comparison table supplied allows the parameter to be determined. AQUASOL range offers a range of pH indicator are developed to meet your specific testing needs. Our AQUASOL pH Indicator Paper combine ease-of-use with accuracy consistency and unmatched quality. The convenience of using AQUASOL pH Indicator Paper for the rapid determination of pH and has many applications in laboratories and industry.