Methods and techniques

Polarised light microscopy (PLM) - Back

Polarised light microscopy is a research technique for identifying pigments and fibres. The particles to be examined, generally between 1 and 20 microns in size – smaller than one-thousandth of a millimetre – are placed under a microscope and a polarised light source is shone through them from below. Because each type of pigment and fibre reacts differently to these light rays, each individual particle can be identified.