HOW DO I DO AN ALIZAROL TEST?

HOW DO I DO AN ALIZAROL TEST?

In a test tube 3 ml of mik of the sample milk examined are stirred and 3 ml of Alizarol, which acts as an indicator. If the milk is fresh, it takes on a yellow colour without coagulation, if the milk is acid it takes on an yellow-orange colour with the formation of lumps