Hours/Day Log reduction
Acceptance criteria Observed results
Bacteria and mold Fungi/Yeast Bacteria Fungi/yeast and mold
24 Hours - - - -
7th day Not less than 1 Log Reduction No increase from the Initial count 0.3 No increase
14th day Not less than 3 Log Reduction No increase from the Initial count 2 No increase
21st day - - - -
28th day No increase from the 14th day count No increase from the Initial count No increase No increase
Table 9: Results of Preservative efficacy test.
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