As previously observed, performing MEW onto SES membrane substrates does not affect the quality of the scaffold , and in this case we can assign different colors to the different components. When MEW was performed onto [10]CPP-PCL SES membranes using a [8]CPP-PCL blend, as expected the fibers and membrane could be readily contrasted with each other using the same incidence wavelength, exemplified in Figure . The MEW fibers are directly visible against the SES membrane with specific fluorescent signals.