21 of 21 people found the following review helpful
2.0 out of 5 stars
WMA 160 pH indicator test strips, 26 Aug. 2013
For the first 12 hours after obtaining these strips they did not react to any liquid, (water, saliva, urine) ! There was no indication on the strips/packaging in English stating that there should be a time lapse once you open them to the time you first used them.
However, after 12 hours when I tried them again they were reacting to liquids.
I could have thrown them away during that time labelling them as 'being no good'.