Economic and Environmental Geology

Table. 5.

Table. 5.

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

Test Before After ΔE
L* a* b* STDEV (n=9) L* a* b* STDEV (n=9)
UV 62.44 55.35 66.16 0.4 54.36 41.40 46.75 2.0 25.23
CO2 62.24 54.50 64.85 0.6 62.17 54.35 64.68 0.3 0.24
NO2 63.16 53.24 62.89 0.5 56.44 50.00 55.22 0.2 10.70
salt spray 62.36 53.99 64.60 0.2 60.94 44.48 46.24 2.0 20.73
Econ. Environ. Geol. 2022;55:281-93 https://doi.org/10.9719/EEG.2022.55.3.281
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