ITEM NAME:800X PH Indicator Test Strips 1-14 Laboratory Paper Litmus Tester Urine^Saliv BX Take accurate alkaline/acid tests with this pack of 80 Litmus paper strips which come in 5 individually sealed books. Each book also includes a colour chart. The scale reads from 1 to 14: 1 - 3 indicates a very acidic substance 4 - 6 indicates an acidic substance 7 indicates neutral 8 - 11 indicates alkalinity 12 - 14 indicates a very high level of alkalinity Make sure your water is safe before using: Litmus paper is invaluable for testing the acid and alkaline levels in all kinds of applications from spas, ponds and aquariums to conducting scientific experiments. Package included:.Each book also includes a colour chart. 8 - 11 indicates alkalinity. 12 - 14 indicates a very high level of alkalinity. The scale reads from 1 to 14.