Making the bulbs requires workers to handle mercury in either solid or liquid form because a small amount of the metal is put into each bulb to start the chemical reaction that creates light.
When the reaction products form as high melting point CA2, CA6 and MA spinel in a continuous solid phase it will clog the liquid channel and resist the further diffusion of fused slag in the brick.
Ammonia and sulfuric acid (SO3) in and the reactionliquid after vacuum evaporation, concentration, crystallization, and then to liquid-solid separation processes obtained dry product.