Leakage in empty paint markers often results from poor sealing structure and low-quality barrel molding.
A professional empty paint marker design includes:
Tight cap sealing
High-density internal reservoir
Stable thread or snap-fit design
Many low-cost suppliers outsource injection molding, which leads to dimensional inconsistencies.
Before placing bulk orders, always request structure samples and test compatibility with your ink.
Preventing leakage not only protects your brand reputation but also reduces return costs in international shipping.
