Table 2 Elements compositions in the pigment particles
Sample | Colour | Elements |
|---|---|---|
SP-1 | Green | Cu, Cl, Si, Ca, Fe, S, K, Pb and Ti |
Black | Si, Ca, Cu, Fe, K, S, Pb and Ti | |
SP-2 | Red | Si, Hg, Ca, Fe, K, S, Ti and Pb |
SP-3 | Reddish orange | Pb, Si, Ca, Fe, K, Zr and Ti |
SP-4 | White | Ca, Si, Al, Fe, K, S, Pb and Ti |