PH Test Paper Litmus Paper PH Indicator Paper

Chemistry is inseparable from solution, and solution has acid and alkali. The "ruler" for testing the pH of the solution is the "extensive pH test paper", which is a ready-made test paper. When using it, tear off a strip and place it in a watch glass. Dip a drop of the test solution with a dry glass rod, or Use a plastic dropper to suck the solution and drop it on the middle of the test paper, and then compare the color of the test paper with the standard colorimetric card to know the pH of the solution, which is very convenient. pH test paper is divided into precision test paper and wide range test paper. The color chart of precision pH test paper is different from that of Guangfan test paper. The colorimetric card of Guangfan pH test paper is one color every one pH value. The precision pH test paper can be divided into 0.5, 0.3, 0.2 or more high accuracy according to the measurement accuracy.