Sannysis 2 Packs Ph 1-14 Test Paper Litmus Strips Tester, 80pcs Per Pack Take accurate alkaline/acid tests with this pack of 160 Litmus paper strips which come in 5 individu 12 - 14 indicates a very high level of alkalinity 1 - 3 indicates a very acidic substance, 4 - 6 indicates an acidic substance Make sure your water is safe before using: Litmus paper is invaluable for testing the acid and alkal 7 indicates neutral, 8 - 11 indicates alkalinity