The false-color SRS image of the dry 60% drug loading film (0 min, Figure , right) was a largely uniform shade of pink, consistent with a single-phase homogeneous film richer in drug than polymer, as well as a sharp film-air interface. The corresponding SRS CLS coefficients (Figure , top le ), extracted from the rectangle in the corresponding false color SRS image, are consistent with a homogenous 60% drug and 40% polymer loading across the film (a devia on of drug and polymer content of about 8% was observed within the film as a broad band in the film, but this does not affect the overall interpreta on of phase changes). A er buffer addi on, the false-color SRS and correla ve confocal reflec on images at each me point, as well as the corresponding coefficients plots, broadly reveal several of the same phase change phenomena observed in the films with the 20% and 40% drug loadings, but with substan ally different kine cs.