Knoop hardness test

The Knoop Hardness test is a way of measuring how hard something is. It works by measuring how much force it takes to make a very small dent in the material. The test uses a diamond point that is pushed into the surface at a very small angle. When the diamond point is pressed into the surface, it leaves a small dent and the force it took to make that dent is measured. This number helps us understand how hard the material is.