Material: the pH paper is made of quality litmus paper, get quick and accurate results in seconds with the good quality pH test paper Multiple applications: the universal pH paper is a good teaching source for schools, laboratory, also can be applied to detect aquariums, hydroponics, fish tanks, industrial test, agricultural test, etc Easy to use and use: take out a small test strip, touch the liquid to be tested, compare the test results with the standard color of the cardboard a few seconds later
