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The test paper allows the quick and easy detection of sperm.
In criminal investigations is used as a rapid screening test. The paper is specific for acid phosphatase. The material in question is allowed to soak in physiological saline solution for about 1 minute.
Then the material is placed on the paper. In presence of acid phosphatase the paper turns violet. The reaction is not a suitable substitute for the microscopic determination of live spermatozoa. The test papers are single sealed in plastic. This ensures clear results at any time.