Loading... Please wait...* Blue Litmus will turn red when tested with an acid.
* Red Litmus will turn blue when tested with a base.
Neutral reaction on Blue means the test substance is a base.
Neutral reaction on Red means the test substance is an acid.
* Do not touch the test area - it will contaminate your results.
Note: Wide Range Ph will give a more accurate assesment (1-14)
and includes a color chart (also available)
The Red/Blue ph paper does NOT include a chart.