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  • Qualitative pH Tests

    These papers do not require the need for a colour chart as their purpose is to demonstrate qualitative analysis in a simple ‘yes’ and ‘no’ manner. They will not provide accurate pH measurement, but will change from one colour to another at a set pH value, depending on the paper. These user friendly test papers are suitable for many industrial and educational applications.

    Whether it is for the determining the presence of strong oxidisers e.g. free chlorine, Johnson Test Papers offers litmus papers for the routine management of acid or alkaline reactions in industry.

    Products
    Product pH range Industry
    Litmus Blue Paper Litmus Blue Paper pH < 7 red /> blue Education Industrial
    Litmus Neutral Paper Litmus Neutral Paper pH < 7 red / > 7 blue Education Industrial
    Litmus Red Paper Litmus Red Paper pH < 7 red/ > 7 blue Education Industrial
    qual Congo Red Paper pH < 3 blue-violet / pH > 5 red-orange Education Industrial
    qual Turmeric Paper pH < 6,8 yellow / pH > 8.6 red Education Industrial
    qual Clayton Yellow Paper pH < 12.0 yellow / pH > 13.0 red Education Industrial
    qual Brilliant Yellow Paper pH < 6.6 yellow / pH > 8.4 red Industrial
    qual Phenolphthalein Paper pH < 8.4 white / pH > 9.6 red Industrial Food Service Homebrew
    qual Methyl Orange Paper pH < 3.0 red/ pH > 4.4 yellow Industrial