Dropper Leakage: Causes & Prevention
Prevent dropper leakage by checking the neck, cap, packing, and actual formulation together. Record where leakage occurs, then review the component combination and closing conditions with samples.
Start by Locating the Leak
Distinguish leakage at the neck and cap from leakage around the bulb or damage to the bottle. This is a general inspection sequence, not a diagnosis of a particular defect or a guarantee against leakage.
Neck and closure mismatch
Equal capacity does not imply the same neck or thread. Compare bottle and closure drawings, then check packing contact on the assembled sample.
Missing, distorted, or contaminated packing
Inner packing seals the interface between the neck and cap. Inspect packing and the bottle opening before assembly, checking for debris or formulation residue on the sealing surfaces.
Closing conditions and component combination
Agree closing conditions for the cap, packing, and bottle rather than simply tightening harder. Check pipette length and assembly interference. A torque meter maximum is not a recommended closing torque.
Formulation and transit conditions
An empty assembly fitting together does not establish suitability. Review leakage and component condition with the actual formula, filling conditions, storage orientation, temperature changes, and transport environment.
Prevention and Reproducible Records
- Record the bottle and dropper models, lots, neck drawings, and packing material together.
- Define actual formula, fill amount, closing conditions, storage orientation, and test duration; retain an approved sample.
- Document leak location, affected quantity, photos, and timing; distinguish each changed condition during rechecking.
- Agree acceptance limits and inspection quantity before ordering. Do not apply one torque or pressure limit to every product.
Published JeongwooCos Evidence
Published equipment specifications: JSVO-30T pressure tester range -100 to 500 kPa; DTXA-10N torque meter maximum torque 10 N·m. These are equipment ranges, not product leak or closure acceptance limits. Agree test conditions and limits for the actual container, closure, and formulation. Equipment specification source
Published FAQ timing: samples average 7–14 days; production is around 30 days from ordering after sample approval. Quantity, finishing, and printing can change the schedule. These are stated guidelines, not a measured lead-time distribution or a delivery guarantee. View FAQ
Review the Bottle and Dropper Together
Share product models, formulation, leak location, and sample review conditions.
Ask About Component FitFAQ
Frequently Asked Questions
What should we check first for dropper leakage?
Record the leak location, then inspect bottle neck, cap, and packing specifications and condition, plus closing conditions. Review an assembled sample with the actual formula, not only an empty container.
Will tightening the cap harder prevent leakage?
Agree closing conditions and acceptance limits for the bottle, cap, and packing combination rather than simply tightening harder. A torque meter maximum is not a recommended product closing torque.
What should a leakage test record include?
Record models and lots, formula, fill amount, closing conditions, orientation, test duration, leak location, affected quantity, and photos. Define test conditions and inspection quantity before ordering.
