https://www.avient.com/sites/default/files/2021-10/microbial-susceptibility-of-various-polymers-and-evaluation.pdf
Control samples (top row) are shown for comparison to samples post-incubation and washing (bottom row)
TABLE 1 Summary of ASTM G21 results for initial
susceptibility screening of untreated resins/compounds
Fungal growth Resin/compound
4 = Heavy growth (61%–
100% coverage, fail)
TPE, 6 formulations
3 = Moderate growth
(31%–60% coverage,
fail)
Poly(urethane), 2 formulations
2 = Light growth (11%–
30% coverage, fail)
Nylon-6,10, PBT, poly(amide)
elastomer, ABS, 3 formulations,
reinforced Nylon, 2 formulations
1 = Trace growth (