How does the antimicrobial compound work?
Moisture is the trigger. As little moisture as is present on a table top at ambient conditions is all that is needed for microbes to grow and to cause the antimicrobial compound to work. The zeolite acts as an ion pump exchanging silver ions with other ions (Na+, Ca+, etc.) present in moisture. The ion exchange continues until it reaches a state of equilibrium. The silver ions penetrate the microbe membrane and prevent RNA/DNA splitting, thereby inhibit growth.
