guide
Cleanability questions for packaging equipment
Questions about contact surfaces, dead ends, and where a cleaning instruction stops. The 2004 review is quoted only as that review.
Section
Hygienic design
Questions about contact surfaces, dead ends and how far a cleaning instruction actually reaches.
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The guide uses problems named in an FDA study from 2004. It does not quote a current hygienic-design standard.
Cleanability of packaging equipment lists what a review should ask before anyone calls a surface cleanable.