THE DECISION IN BRIEF
Our unopened retained bottles perform worse than frequently used samples. What should we compare?
Evaluate unused filled packs and used controls with matched formula and component identities. Review storage contact, startup, sealing, and material condition separately.
Preserve the unused condition
A frequently operated development bottle is not a substitute for an unopened retail pack. Keep identified filled samples that remain unused until each agreed evaluation point. Record filling, assembly, storage orientation, conditions, and elapsed time.
Include suitable formula controls chosen by the product team. If the liquid itself changes, the pump result needs that context. Avoid opening every retained pack at each review and then describing later observations as unused storage performance.
Separate the assessment questions
Berlin Packaging includes stability and leak methods in its quality resources. Choose the relevant comparison with the technical team rather than assuming one spray check covers long-term package suitability.
| Question | Observation |
|---|---|
| Containment | Liquid location and agreed mass or seal check |
| Startup | First-use behavior recorded separately |
| Stable dispensing | Controlled performance after startup |
| Material condition | Visible changes and relevant examination |
Interpret differences carefully
If used samples remain stable but unopened packs change, investigate contact history and the startup sequence. Do not automatically conclude that regular use protects the pump. The two groups may also differ in headspace, formula state, or storage. Preserve the variables and ask for a targeted review.
If a problem follows a particular material or engine, request an identified alternative and compare it under the same storage plan. A fresh substitute that sprays once cannot resolve a long-contact concern. Keep failed originals for examination before cleaning or replacing parts.
Have the product team determine meaningful evaluation intervals and any accelerated work. Those conditions should be justified for the product and clearly distinguished from its intended shelf life. This guide does not assign universal storage durations to all perfume or personal-care mists.
Release the supported formula and package combination with the storage evidence and any limitations. Maintain unused retains for later confirmation as appropriate to the quality plan. The resulting approval should represent the customer opening a stored product, as well as the development team repeatedly spraying a familiar sample.
Sources & further reading
Use the references below alongside the selected component drawing and agreed sample plan. Product-specific claims need product-specific evidence.
PRODUCT REFERENCES
Components to discuss with your supplier.
These references share the component type discussed here. Confirm the selected assembly and application with samples.
Related articles
VIEW THE COMPONENTS
