In this study, we have shown that TiO2 photocatalyst layers can be coated onto heat-sensitive substrates and be calcined using a laser without damaging the substrate. Two different approaches were evaluated: Using pre-fabricated TiO2 particles (P25) and using a TiO2-precursor (TTIP) that is hydrolyzed on the substrate. Oxygen-plasma treated COP-plates pre-coated with a this SiO2 layer were used as substates and coated via dip coating.