In complement to the classical cross-linking polymers which cure thermally, light- and photo-curing polymers are becoming increasingly important in the fields of adhesives, paints and coatings. To examine such curing reactions, controlled lighting is applied as an add-on to established thermoanalytical methods. The resulting techniques include photo differential scanning calorimetry (Photo-DSC), photo dielectric analysis (Photo-DEA) and photo dynamic mechanical analysis (Photo-DMA). This webinar explains the basics of cross-linking by means of photo-curing, introduces the appropriate thermoanalytical instruments and illustrates numerous application possibilities using selected examples.