Hemastix - Presumptive Blood Test
Package of 50 tests (8 cm long strips with a reactive area of 5 x 5 mm at one end).
To quickly find out if a suspicious stain on an object or fabric is consistent with blood, several tests can be used. These tests make use of color reactions that are catalyzed by blood. They do not differentiate between human and animal blood, however, and false positives are possible.
For the use of Hemastix, a drop of water is applied to the suspicious stain. After a few moments (to allow some of the blood to dissolve), the reactive area at one end of the strip is brought in contact with the water. A green colouration of the test surface is indicative for the presence of blood.
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