The objective of this study was to quantify the UV transmission (Figure 1) of split skin exposed to UVB radiation and of non-exposed skin and to compare the two values.
Materials and Methods
Two specimens of split skin having the dimensions 1 cm x 1 cm and with a thickness of 0.3 mm were taken from each patient.
Figure 4 shows the spectra of the mean transmission values obtained from the 12 patients for non-exposed skin and skin subjected to UVB radiation.
The ultraviolet protection factor (UPF) of the split- skin specimens was subsequently calculated from the transmission data.
The UPF of the split skin specimens of skin exposed to UVB radiation was found to be three times as high as the UPF of non-exposed skin (Figure 6).
The study had thus succeeded in objectifying and exactly quantifying the natural protection factor triggered by UVB radiation.
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