346Dental MaterialsMedium
Greening occuring when porcelains are fired on silver free alloys may be attributed to________?
AVaporization of silver from the walls of contaminated furnaces
BMore rapid silver diffusion in sodium containing glass
CSurface diffusion of silver from the marginal metal
DSilver ionization by porcelains with high oxygen potential
Correct answer
A. Vaporization of silver from the walls of contaminated furnaces
Explanation
The correct answer is Vaporization of silver from the walls of contaminated furnaces.