Background
A Norwegian mason jar supplier came to Yeboda for assistance in resolving the sealing problems which kept reoccurring in their custom mason jars. Their clients were reporting frequently that the lids were loose, air leaks were occurring, and vacuum sealing was not going well—these were issues that both compromised product freshness and increased the return rates. The supplier was in need of a trustworthy partner who could take on the job of delivering custom jars with better sealing performance.
Challenges
The sealing failures were the result of the uneven thickness of the jar rim, the unstable geometry of the threads, and the low-precision lid fittings that were coming from their previous manufacturer. Because of these issues, the mason jar supplier found it very hard to assure airtight performance, especially in the case of food-grade applications that require long-term freshness and safety.
Yeboda Solutions
Precision Mold Redesign
Yeboda took the first step in the process by redesigning the molds so that the jar rims would be not only perfectly level but also the thread structures would be stable. This was a way to guarantee that the lids would fit perfectly and be tightened securely without the occurrence of deformation or gaps.
Upgraded Lid & Gasket System
A new sealing system was introduced using thicker rubber gaskets and improved metal lid threading. These upgrades enhanced vacuum performance and prevented air leakage even under temperature changes or long storage periods.
Enhanced Quality Control
Yeboda implemented strict QC measures including vacuum-pressure testing, thread compatibility checks, and rim-smoothness inspections. Each production batch was tested to ensure consistent sealing reliability before shipping.
Results
The sealing performance improved dramatically. The Norwegian mason jar supplier reported an over 50% reduction in customer complaints, and retailers noticed fewer returns and better shelf stability. With reliable custom jars and stronger sealing, the supplier expanded into higher-value food, honey, and fermentation markets.
Conclusion
By optimizing mold design, improving lid compatibility, and enforcing strict quality control, Yeboda helped the Norwegian mason jar supplier successfully eliminate sealing issues and deliver durable, airtight custom mason jars trusted by their customers.
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