Lead testing paper indicates the presence of lead in solutions or on surfaces. The papers come in forty 25 x 40 mm size sheets.
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Color change of pink to a deep purple-red indicates the presence of lead in solutions or on surfaces. Limits of sensitivity: 0.05 micrograms on surfaces, 5 milligrams/liter (5 ppm) in solutions. The presence of as little as 50 ppb in solution can be determined by using evaporation techniques. Forty 25 x 40 mm size sheets.