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Start with the exact build that rattles. Note whether it contains a pan, puff, refill, mirror or other removable parts. Hold the closed compact the same way each time and move it gently in a repeatable direction. Try lightly supporting the lid against the base near the latch, then compare with support near the hinge. If the sound changes, that tells you where damping the assembly had an effect. It does not yet prove which part made contact.

Isolate one component at a time

On a separate unit, remove only parts intended to come out and repeat the same movement. If the insert can be safely isolated, compare the original assembly with a matched unit in which the insert is temporarily supported. Compare open and closed conditions while avoiding damage to the latch. A change when the lid is open may reflect both the lid’s motion and a change in how the insert is restrained.

Confirm before changing a fit

Check for corresponding play and contact marks at the suspected location. Consider other moving parts if the insert and lid checks do not explain the sound. Record the build, direction, support location and result for each trial. Check closure and removability again after any change. A tighter fit may reduce a rattle while making a refill harder to remove.

Packaging sample showroom of SamBound New Material Technology Company Ltd. Company information: sambound.com.

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SamBound New Material Technology Company Ltd.

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