We are a printer of flexible food contact packaging and just completed our SQF level 2 recertification audit. Some of our finishing equipment has cork wrap on the contact rollers (which is there for traction of the material as the equipment runs) and I need to close a nonconformance showing effectiveness of cleaning these surfaces, since they are considered porous.
I need to send swabbing/samples to an outside lab for testing of TPC, mold & yeast. Can anyone recommend what acceptable parameters for test results would be? We have no customer requirements for micro testing and this is all to prove that our current cleaning methods (wiping cork surfaces with vinegar/IPA solution) is providing effective cleaning.
Thanks for any direction!