Science of Ultra-Fresh – ISO Test

Quantitative Bacterial Testing

The AATCC Method 147 and AATCC Method 30 tests give either a pass or a fail result, which is often all that is required.

As an example of the many other types of test carried out in the TRA laboratories, here is one that measures the number of bacteria on an Ultra-Fresh treated sample when compared to one that is untreated. This is the ISO 20743:2007 quantitative analysis.

In a quantitative test a known amount of bacteria is put onto both an Ultra-Fresh treated sample and onto an untreated sample. The samples are incubated for 24 hours to allow the bacteria time to grow.

After 24 hours, the samples are shaken in a liquid solution to remove all of the bacteria from the samples. The liquid is then tested to see which sample had the highest bacterial counts. Here is an image of a typical result.

Bacteria test results.

This photo shows a 99% reduction in bacteria.

The Ultra-Fresh treated sample had roughly 2 million fewer bacteria than the untreated.

Ultra-Fresh products are sold globally, but not all the information on this web site may apply in all countries. Local legal requirements may limit which Ultra-Fresh products are available, how they may be used and what claims may be made for our products and for treated articles. If you have questions about requirements in your country or in the countries where your treated articles may be sold please contact Thomson Research Associates for assistance. Ultra-Fresh products should be distributed, sold and used only in accordance with government regulations and the specifications on their labels.