What Is ASTM E3031?
ASTM E3031 is a quantitative test method used to determine the antibacterial effectiveness of ceramic and sanitaryware materials.
How Does ASTM E3031 Work?
Samples are challenged with Escherichia coli. The test bacteria are exposed to the samples over a 18-24-hour period. During this time the bacteria and samples are kept at 37°C, an optimal temperature for the bacteria to grow.
Following the exposure time of bacteria to the test material, the bacteria are removed from the samples and counted. The number of surviving bacteria is compared to the number of starting bacteria. Differences between the starting and ending number of bacteria are calculated as a percentage reduction or log reduction.
The Microban Standard: 99% Reduction in Bacteria
By Microban's self-imposed standards, a 99% or 2-log reduction is typically expected to demonstrate that your built-in antimicrobial formulation is working effectively.
Find Out More
For more information on our ASTM E3031 testing capabilities, contact a member of the Microban team today.