A method for curing a three dimensional (3D) printed part is disclosed. For example, the method includes adding a layer of a build material, curing the layer of the build material using a first light source having a first wavelength, repeating the adding and the curing using the light source having the first wavelength for a predefined number of layers, adding a final top layer of the build material to form the 3D printed part and curing the final top layer of the build material using a second light source having a second wavelength that is different than the first wavelength.