Fig. 3.

Histology of non-occluded hairless guinea pig skin excised at different times after microdermabrasion: a 1 min, b 4 h, c 12 h, and d 24 h. Each pair of images shows the same skin section imaged with different staining using different optics: (1) after routine H&E staining by brightfield microscopy and (2) showing staining with red-fluorescent sulforhodamine by fluorescence microscopy. These images are representative of skin samples from four different animals at each time point