ITEM NAME:20pcs Full Range 1-14 pH Test Paper Strips Litmus Testing Indicator img *{margin:0;padding:0;.The smaller the number, the stronger the acidity, the larger the value, the stronger the alkalinity. PH 1-14 universal indicator papers for alkaline / acid tests. PH Color Chart Intervals: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14.
