FUNGAL RESISTANCE TESTING STANDARDS

The ASTM G-21 procedure requires a composite fungal spore suspension to be sprayed on the sample materials with an atomizer while the samples are horizontal in a nutrient growth agar deficient of a carbohydrate source. Due to this process, no organic source (aside from the sample in question) is available for the fungal suspension to utilize for growth. The samples are incubated at elevated temperature and humidity for 28 days. Upon completion of the test, magnified microscopic images are taken in order to determine the state of fungal growth.

MIL-STD-810H is used by most defense contracts and military interests to determine the structural integrity of a wide array of composites, coatings, and more. This method calls for five different fungi to be inoculated to the test samples at a specific concentration. Numerous verification steps are run on the fungal cultures to validate the process. All positive controls and sample specimen are to be held in a controlled range of temperature and humidity; the samples are observed for fungi growth after 28 days

RTCA DO-160G is utilized by the aviation industry to assess the fitness of various structures as they're exposed to environmental pressures. This method calls for five different fungi to be inoculated to the test samples at a specific concentration. Numerous verification steps are run on the fungal cultures to validate the process. All positive controls and sample specimen are to be held in a controlled range of temperature and humidity; the samples are observed for fungi growth after 28 days.

ASTM 1338 methods calls for five different fungi to be inoculated to the test samples and for them to be held in a controlled range of temperature and humidity; the samples are observed for fungi growth after 28 days.

This method is used to test a wide variety of industrial paper products. Susceptible products typically have long shelf lives and high humidity storage such as soaps or beverage labels. ASTM D 2020 procedure calls for the specimen on a Nutrient Salt Agar petri dish to be inoculated with fungal spores separated by species. The specimens for testing in the environmental chamber are thus covered with individual suspensions of fungal spores on each petri dish for 28 days to test for antifungal activity.