Johnson test papers

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pH Indicator Strips (non-bleed)

pH Indicator Strips (non-bleed)The indicator pads on these environmentally friendly strips are prepared as a non bleed system therefore the resultant colour change remains far longer and readable until the pad is dry.Each strip is long enough to prot..

pH Indicator Strips 5.2 - 6.7

pH Indicator Strips (non-bleed)The indicator pads on these environmentally friendly strips are prepared as a non bleed system therefore the resultant colour change remains far longer and readable until the pad is dry.Each strip is long enough to prot..