Background
A mason jar factory in Ghana reached out to Minghang for help in solving continuous problems of lid leaks in their custom mason jars. The clients spoke of spills and loss of freshness which led to returns that had increased in number and also, there was a lack of trust in the product. The factory was in need of a solution that would guarantee airtight and long-lasting lids for their custom jars.
Challenges
The principal issues were the uneven surfaces of the rims of jars, the poorly done threading, and the low quality of the gaskets. These issues led to lids that were loose and as a result, leaks were created and the safety of the stored products was compromised. The ways in which standard productions were carried out were not enough for the handling of these custom specifications.

Minghang Solutions
Precision Mold Adjustments
Minghang modified the molds of jars to have even rims and also the threading was uniform. This made it possible for the lids to be placed firmly and they could be tightened thus, the usual problems of misalignment were solved.
Upgraded Lid and Sealing System
The members introduced the use of metal lids that were reinforced and accompanied by high-quality silicone gaskets. This duo was excellent in sealing and even when there were changes in temperature or storage was for a long time, airtightness was maintained.
Enhanced Quality Assurance
There were very strict quality control standards that were put in place Leak testing, inspection of smoothness of rims, and checking of thread compatibility were among them. Testing of each lot was done ensuring that every jar was up to standard in terms of sealing.
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| Custom 65ml Mason Drinking Jar with Handle | Custom 150ml 300ml 380ml 500ml Large Mason Jar |
Results
The Ghanaian mason jar factory has been able to cut down the occurrences of lid leakage by more than 50%. Customers are saying that product freshness and reliability are getting better and the factory has the capacity now to enter the food and beverage industries that are in need of high-quality, airtight jars.
Conclusion
Mold precision, better lids, and quality control were the factors through which Minghang was able to aid the mason jar factory in Ghana in solving issues of lid leakage and hence provide reliable custom mason jars that are trusted by clients.
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