Economic and Environmental Geology

Table. 3.

Table. 3.

Results of color difference of White lead under the various environmental test

Test Before After ΔE
L* a* b* STDEV (n=9) L* a* b* STDEV (n=9)
UV 95.97 0.12 0.52 0.2 91.74 -0.33 0.84 0.3 4.27
CO2 95.90 0.09 0.48 0.2 95.87 0.08 0.51 0.1 0.05
NO2 94.43 0.06 0.40 0.3 93.57 0.25 2.25 0.5 2.04
salt spray 96.46 0.13 0.45 0.1 81.42 -0.11 -1.73 2.2 15.20
Econ. Environ. Geol. 2022;55:281-93 https://doi.org/10.9719/EEG.2022.55.3.281
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