The TMP (thymophthalein monophosphate) test is designed to provide a convenient, reliable laboratory test for the presumptive presence of acid phosphatase (semen). It is more sensitive to the presence of acid phosphatase than other presumptive tests. All reagents are in dropper bottles. To perform the test, first transfer part of the suspected stain to provided transfer paper or to a cotton-tipped swab with sterile water. Add a drop or two of TMP Part A Reagent to the transferred stain and allow to react for 1-3 min. Next add a drop or two of TMP Part B Reagent to the stain. A positive result for the presumptive presence of acid phosphatase is indicated by a blue color. Kit contains reagents to perform at least 100 tests.