Are you into cosmetic formulations? Testing the PH value of your products is essential for professionally made and effective products. You need our Litmus paper strips to take accurate alkaline/acid tests.
100% Brand New.
High accuracy pH test paper, pH range from 1-14
PH 1-14 color chart in each pack
The test strip color changes must be matched with the pH scale color chart within about 15 seconds.
Simply press the testing strip to the object or liquid you are testing. Half second later, take out the paper and using the color chart included, compare the color change of the paper to find out the acidity level of your testing subject.
Can not indicate the Acid or alkali solution when its density was lower than 0.01%.
Keep the book dry