From: Setup of a sustainable indoor cleaning methodology for the sculpted stone surfaces of the Duomo of Milan
Component
Eigenvalue
% Explained or relative variance
% Cumulative variance
1
26.350
77.499
77.50%
2
7.530
22.147
99.65%
3
0.106
0.313
99.96%
4
0.009
0.027
99.99%
5
0.003
0.007
6
0.002
0.005
100.00%