Quick Answer
For an aluminium cosmetic bottle, identify the internal surface that the formula contacts, including any proposed coating or liner. Keep that reference linked to the bottle and manufacturing revision. An aluminium exterior or a general material statement does not establish compatibility of the finished internal construction.
Procurement may receive a metal bottle description while the development team needs the identity of the finished inner surface. This article organises that information request and its handoff into sample approval. It does not certify a coating, prescribe a chemical test or claim that aluminium suits every cosmetic formula.
Name the contact surface, not only the shell
Ask the supplier to describe the proposed internal construction for the exact bottle reference. Establish whether the formula contacts metal, a coating or another identified surface. Keep the answer attached to the actual component rather than a generic brochure covering several bottle families. If the supplier cannot yet identify the construction, record the gap.
The exterior finish should have its own description. A brushed or coloured outer appearance does not identify what is inside. Separate the decorative reference, internal-surface reference and bottle drawing so a later visual substitution cannot silently become a product-contact substitution.
Request the scope of each supplied document
For each statement or test document offered, ask which component, material reference and revision it covers. Record who issued it and the purpose for which it is being supplied. Do not convert a general resin or coating document into an approval of every finished bottle supplied under the same commercial name.
Where information is confidential, agree an appropriate review route with the responsible parties rather than guess the missing specification. Procurement should preserve the document reference and scope of technical acceptance. A short public product listing does not need to disclose proprietary details, but the project still needs an accountable evidence review.
Link the trial to representative samples
Identify the samples used in the actual-formula evaluation, including bottle lot and internal construction. The formula owner and technical teams should define the relevant conditions, observations and acceptance criteria. This record structure supplies no universal exposure duration or pass limit.
Retain the starting condition and any applicable preparation history. A sample made through a different coating route can answer limited questions while failing to represent the proposed supply. Ask the supplier to explain that distinction before the trial is described as production approval. Keep unresolved scope visible rather than burying it in an email attachment.
Record observations without assigning a premature cause
If the trial shows visible change, identify its location and the sample history. Record observations such as an appearance difference, a changed closure condition or a formula concern using the team’s agreed method. Avoid concluding that the coating has failed from one photograph without the relevant investigation.
Preserve the samples under the responsible team’s instructions. A replacement bottle should receive a separate identity rather than overwrite the affected specimen. If more than one input changes in the next trial, list all changes so an improved result is not incorrectly attributed to a single material substitution.
Review the closure within the same pack
The internal bottle surface is not the only possible contact part. Identify the closure, liner, pump and other components relevant to the selected assembly. Link their evidence to the complete pack while keeping each component reference distinct. A successful body review cannot independently approve a substituted gasket.
Consider an illustrative offer in which the body is unchanged but a new closure liner is proposed for availability reasons. Keep the original bottle evidence, then ask which closure and complete-pack checks are affected. Do not discard useful records, but do not extend their scope beyond the configuration they actually describe.
Control the ordered construction
Put the accepted internal construction reference and change-notification requirements into the controlled project specification. A purchase order that says aluminium bottle only may leave an important technical choice implicit. Ask the supplier to identify whether later process or material changes require renewed approval.
For distribution, keep public claims within the evidence actually accepted. Do not add food-grade, universal chemical resistance or indefinitely reusable wording based on the metal name alone. Confirm model availability, included decoration and commercial minimums separately; the established glass and plastic bottle quantities should not be automatically applied to an unconfirmed metal format.
Project Review Record
| Field | Decision or evidence to retain |
|---|---|
| Body identity | Bottle reference, lot and drawing revision |
| Internal construction | Contact surface and coating reference where applicable |
| Evidence scope | Issuer, component coverage and technical review |
| Complete assembly | Closure, contact parts and change controls |
Connect this record to the complete packaging sample approval. For the wider context, review custom packaging project scope. Send the identified configuration and open questions to Oulete; availability, included operations and commercial terms require confirmation for the selected supply.
FAQ
Does aluminium on the outside identify the inside?
No. Request the actual internal construction for the selected reference.
Can a supplier document replace formula trials?
Only the responsible team can determine its applicable scope; a generic statement is not a complete-pack approval.