| Tube Material | Confirm the tube body, shoulder, cap, applicator, and any internal components are identified by material and construction. | Material specifications, component drawings, and declarations for any recycled or bio-based content. | Compare the documented construction with the approved sample and product requirements. Do not assume that a material is suitable based on its name alone. |
| Product Compatibility | Check compatibility with the actual lip gloss formula, including its oils, pigments, fragrance, and other ingredients. | Compatibility-test plan and results for the proposed formula and packaging configuration. | Agree on storage conditions, duration, inspection points, and acceptance criteria before testing. Look for changes such as leakage, swelling, cracking, discoloration, odor, or impaired dispensing. |
| Leakage and Closure | Assess the seal between the tube, shoulder, closure, and applicator or dispensing opening. | Leak-test procedure, sample size, test conditions, and recorded results. | Evaluate samples in the intended filled configuration and orientation. Set pass/fail limits for leakage with the supplier rather than relying on an unspecified “leak-proof” claim. |
| Dimensions and Capacity | Verify nominal fill volume, usable product capacity, tube dimensions, opening size, and closure fit. | Dimensioned drawings, tolerances, capacity data, and inspection records. | Check measured samples against the agreed drawing and confirm that the package works with the filling process and target fill quantity. |
| Dispensing Performance | Check squeeze force, product flow, applicator feel, and the amount dispensed during use. | Prototype samples and, where available, dispensing-test method and results. | Test with the intended formula at relevant use and storage conditions. Assess whether the product dispenses consistently without excessive force, clogging, or uncontrolled discharge. |
| Packaging Safety Information | Review information relevant to the materials and intended markets, including applicable chemical restrictions and packaging requirements. | Material declarations, applicable compliance statements, and supporting test reports where relevant. | Check that documents cover the specific components and markets in scope. A general certificate should not be treated as proof that every component or finished package complies. |
| Color and Decoration | Confirm color consistency, print or label durability, and the placement and legibility of artwork. | Approved color standard, decorated samples, artwork proof, and inspection criteria. | Approve a physical sample and define how color, registration, rub resistance, and cosmetic appearance will be checked in production. |
| Quality Control | Understand incoming-material checks, in-process inspections, final inspection, defect classification, and traceability. | Quality procedures, inspection records, defect criteria, and lot or batch traceability examples. | Confirm that inspection methods and acceptance limits are agreed before the order. Ask how nonconforming products and corrective actions are documented. |
| Production Capability | Assess whether the supplier can make the required tube format, decoration, assembly, and order quantity consistently. | Process overview, available equipment or subcontracting details, production samples, and capacity information for the requested schedule. | Confirm which operations are performed in-house, which are outsourced, and how changes to materials, tooling, or production sites are controlled. |
| Sampling and Tooling | Clarify sample availability, tooling ownership, tooling costs, and the approval process for custom designs. | Sample plan, tooling quotation, ownership terms, and written sample-approval records. | Approve the final specification and production-representative sample before mass production. Record any agreed deviations in writing. |
| Order Terms and Lead Time | Review minimum order quantity, quoted lead time, payment terms, and how delivery dates are confirmed. | Written quotation, production schedule, and order terms for the specific specification. | Compare quotations on the same basis, including decoration, packaging, tooling, freight, and any inspection costs. Treat lead times as order-specific, not universal. |
| Change Management | Check how the supplier handles changes to material sources, components, manufacturing locations, and processes. | Documented change-notification procedure and sample change-control records. | Agree which changes require advance notice, evaluation, or renewed approval before affected production is released. |