The two Petri dishes at the right show the AATCC Method 147 test performed on Ultra-Fresh treated and untreated fabrics.

The bacteria used is Staphylococcus aureus, which is commonly found on the skin. The bacterial culture is streaked onto the clear nutrient agar medium in each dish. Then the piece of fabric is placed directly on top of the streaks in the nutrient. The dishes are then incubated for 24 hours at 37°C.

The yellow streaks are the visual indication of the rapid growth of the bacteria. In contact with the untreated fabric there was no inhibition of bacterial growth. No bacterial growth occurred in contact with the Ultra-Fresh treated fabric. In addition, there is a "zone of inhibition" around the Ultra-Fresh treated sample.

The two Petri dishes at the right show the AATCC Method 30 performed on an Ultra-Fresh treated fabric and an untreated fabric.

The fungus is Aspergillus niger , which is commonly found in the environment and is often referred to as "mildew". Microscopic fungal spores are sprayed onto the surface of the two fabric samples that have been placed on clear nutrient media in the dishes. The fungal spores are allowed to incubate for 7 days at 28°C.

The picture shows a sequence of photos taken in the TRA laboratories as the fungus develops over several days.

After 7 days, the dark fungus is highly visible. There is fungal growth on the nutrient medium and on the untreated sample. By comparison, there is no growth on the surface of the Ultra-Fresh treated fabric and there is a "zone of inhibition" around the sample.

The Ultra-Fresh treated fabrics are well protected against the growth of bacteria and fungi.