Product Name：Nikken PH test pen
Product Code： XBL-06
Nikken PH test pen
It can easily measure the PH value of solid surfaces such as paper or cloth and pens.
In order to make a correct decision, the following must be observed:
1. Make color comparisons in bright places.
2. In order to make the judgment correctly, it must be judged in a short time (within 5 minutes).
3. It is difficult to get a correct judgment in places where more volatile substances (acids, alkalis) are produced.
Apply the liquid medicine and compare the color change of the applied part with the standard color chart attached to the test.
This determines the pH value.