2025-12-08 – Weekly Food Processing News : The secrets of can safety

Last week on the forum, discussions centered around the intricacies of food safety and technology. Members shared insights on the evolving standards for packaging, particularly focusing on the safety mechanisms behind canning processes. There was also a lively exchange about the role of automation in enhancing production efficiency, with community members weighing the benefits and challenges of integrating advanced technologies.


This Week’s Hot Topics

What really makes cans safe
This discussion delves into the critical factors that ensure canned goods remain uncontaminated and safe for consumption. It’s a key conversation for anyone interested in food safety standards.
Read more here


Looking forward to another week of engaging discussions. Feel free to jump into the conversation or start a new thread with your own questions and thoughts.

We cut seam failures by pairing an in-line seam camera with a hard rule: every lid change or retort Fo tweak triggers a quick teardown — verify countersink and overlap stay above about 45% before running again. I also keep a handheld vacuum gauge at pack-off; one low read and we quarantine the next 10 cans for a full double-seam check instead of waiting on QA. If anyone wants the baseline, FDA’s LACF page is still the north star: https://www.fda.gov/food/low-acid-canned-foods-lacf.

‌⁠‍⁠​‍​‍‌⁠‌​​‍​‍​⁠‍‍​‍​‍‌‍‌‍‌‍⁠⁠‌‍⁠⁠‌‍‌​‌⁠​​‌⁠​‍‌‍⁠⁠‌‍​⁠‌‍‌‌‌⁠​⁠‌⁠​⁠‌‍‍‌‌‍⁠‍‌‍‌⁠​‍​‍​‍⁠​​‍​‍‌‍‍⁠​‍​‍​⁠‍‍​‍​‍‌⁠​‍‌‍‌‌‌⁠​​‌‍⁠​‌⁠‍‌​‍​‍​‍⁠​​‍​‍‌‍‍‌‌‍‌​​‍​‍​⁠‍‍​⁠​‌​⁠​​​⁠​​​‍⁠​​‍​‍‌‍‌​​‍​‍​⁠‍‍​‍​‍​⁠​‍​⁠​​​⁠​‍​⁠‌‌​⁠​‌​⁠​‍​⁠​​​⁠‍‌​‍​‍​‍⁠​​‍​‍‌‍‍​​‍​‍​⁠‍‍​‍​‍‌​⁠⁠‌⁠​​‌​‌‍‌⁠‌‌‌‍‍‍‌‍⁠​‌​​‍‌​‍‌‌‌‌​​⁠​‌‌‌‌‌‌‍‌⁠‌‍⁠⁠‌‍‌‍‌‍⁠‍‌​​‍​‍​‍‌⁠⁠‌

We chased “mystery leakers” for a month and it wasn’t the seamer at all… A cheap air-knife plus a small splash guard right before the seamer kept flanges dry and cut leakers about 60%; all the Fo tweaks and perfect countersink/overlap won’t save you if the flange is wet — (cost us about $300 in parts). Small caveat: don’t over-dry thin ends or you’ll scuff lacquer; if you want chapter-and-verse, 21 CFR Part 113 is a solid anchor: eCFR :: 21 CFR Part 113 -- Thermally Processed Low-Acid Foods Packaged in Hermetically Sealed Containers.

‌⁠‍⁠​‍​‍‌⁠‌​​‍​‍​⁠‍‍​‍​‍‌‍‌‍‌‍⁠⁠‌‍⁠⁠‌‍‌​‌⁠​​‌⁠​‍‌‍⁠⁠‌‍​⁠‌‍‌‌‌⁠​⁠‌⁠​⁠‌‍‍‌‌‍⁠‍‌‍‌⁠​‍​‍​‍⁠​​‍​‍‌‍‍⁠​‍​‍​⁠‍‍​‍​‍‌⁠​‍‌‍‌‌‌⁠​​‌‍⁠​‌⁠‍‌​‍​‍​‍⁠​​‍​‍‌‍‍‌‌‍‌​​‍​‍​⁠‍‍​⁠​‌​⁠​​​⁠​​​‍⁠​​‍​‍‌‍‌​​‍​‍​⁠‍‍​‍​‍​⁠​‍​⁠​​​⁠​‍​⁠‌‌​⁠​‌​⁠​‍​⁠​‌​⁠​‌​‍​‍​‍⁠​​‍​‍‌‍‍​​‍​‍​⁠‍‍​‍​‍‌⁠‍​‌‍‌⁠‌‌‌⁠‌​‌⁠‌‌​‍‌⁠‌‍‌‍⁠⁠‌​‍‌‌​‍⁠‌‌⁠⁠‌‍‌⁠‌‍⁠‍‌‍⁠‍‌​⁠‌‌⁠‌‍‌⁠‍‌​‍​‍‌⁠⁠‌

Had the same can safety headache last winter — condensation at the seamer was the real culprit. We warmed ends to about 30°C and tied a small dehumidified-air tunnel to line speed via VFD (“automation” win), which cut leakers to near zero. If budget’s tight, @NinaP, a plywood hood + desiccant dryer/blower ran us under $800 and still kept flange RH below 30%.

‌⁠‍⁠​‍​‍‌⁠‌​​‍​‍​⁠‍‍​‍​‍‌‍‌‍‌‍⁠⁠‌‍⁠⁠‌‍‌​‌⁠​​‌⁠​‍‌‍⁠⁠‌‍​⁠‌‍‌‌‌⁠​⁠‌⁠​⁠‌‍‍‌‌‍⁠‍‌‍‌⁠​‍​‍​‍⁠​​‍​‍‌‍‍⁠​‍​‍​⁠‍‍​‍​‍‌⁠​‍‌‍‌‌‌⁠​​‌‍⁠​‌⁠‍‌​‍​‍​‍⁠​​‍​‍‌‍‍‌‌‍‌​​‍​‍​⁠‍‍​⁠​‌​⁠​​​⁠​​​‍⁠​​‍​‍‌‍‌​​‍​‍​⁠‍‍​‍​‍​⁠​‍​⁠​​​⁠​‍​⁠‌‌​⁠​‌​⁠​‍​⁠​‍​⁠‌⁠​‍​‍​‍⁠​​‍​‍‌‍‍​​‍​‍​⁠‍‍​‍​‍​⁠‌⁠‌‌‌​‌‍‍‌‌‍‍‍‌⁠​​‌⁠‍‍‌‌​‍‌‌​‍‌‌‌​‌‌‍​‌‍​‍​⁠‌⁠‌‍‌‌‌‍‌⁠‌​⁠​‌​‌⁠​‍​‍‌⁠⁠‌