Figure 4

Fluorescence photographs of FP films developed using FDIP solution on glass surface and stored for (a) 1 day, (b) 7 days, (c) 30 days, (d) 360 days (The FPs are from the same finger); (a1–d1) 3-dimensional interactive plots of the corresponding FP (a–d) (showing uniform distribution of the prepared solution over the ridges); (e–h) fluorescence images of donor fingers impressed on the surface of the glass substrate and subsequently aged for 1, 7, 30 and 90 days. The corresponding gray scale profiles of each images of (e–h), display fluctuations of the gray values between FP ridge and furrow across the yellow line (Scale bar: 5 mm).