Fig. 5

Efficacy of copper–glass ceramic particles after simulated wear. Plot of antimicrobial potency following washing and abrasion that illustrates longevity of copper–glass ceramic particles. Test paint coatings maintain bactericidal efficacy (>99.9%) even after 4 years of simulated wear (“Methods”). Each wear cycle represents 4× washing and abrasion every month. Log reduction calculations are differences in S. aureus colony counts between control and test coupons (both subjected to wear cycles). Data and error bars represent mean and standard deviation from n = 2 replicates