Counting bacteria in dry market pulp, paper and paperboard
In December 2014 NEN-ISO 8784-1 was published, specifying a method for determining the total number of colony-forming units of bacteria and bacterial spores in dry market pulp, paper, and paperboard after disintegration. This edition replaces the second edition (2005), which has been technically revised. One of the main changes is that this new edition is only applicable to bacteria and bacterial spores, and no longer applicable to yeast and mould. The incubation temperature has also been changed, from (37 °C ± 1 °C) to (32 °C ± 2 °C). It is intended for the estimation of colony-forming units, CFU, aerobic bacteria, and bacterial spores (World Packaging Standardisation Newsletter, April 2015).
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