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