tl;dr: - plastic is less dense than ceramic or steel, and thus when brought to a certain temperature it holds less heath. This is true even if plastic's specif

tl;dr: - plastic is less dense than ceramic or steel, and thus when brought to a certain temperature it holds less heath. This is true even if plastic's specific heath (kJ/Kg K) is higher. - plastic is hydrophobic, so water does not spread over the surface as a thin film, but collects in larger drops. These drops have a lower surface/volume ratio, and so take longer to evaporate