Cap sample approved: which records should be completed before a production order?

When taking a successful cap sample into a production order, link the product code, bottle drawing, test conditions and acceptance decision in one record. Sample approval and acceptance of an incoming production lot are separate decisions.

2026-09-28

Cap sample, tag and order documents representing the transition from sample approval to a production order — Illustrative image: records for the transition from sample approval to a production order.

What does “we liked the sample” actually approve?

A cap may appear suitable when closed and opened by hand; that observation does not have the same scope as a cap–bottle combination tested on a filling line. Before placing a production order, document what the approval covers: appearance and colour, fit with the bottle finish, application under specific line conditions, or a defined leak test? The record-keeping suggestions in this article are for purchasing and quality teams; they are neither a complete standard test procedure nor a test service that Peksan has committed to provide.

Identify the approved combination

The record should include the full cap code and option, sample lot information, the number and revision of the product data sheet used, the bottle finish drawing revision and the identity of the bottle tested. Do not rely on a photograph alone to identify a liner or foil option. Link the retained reference sample to this record, and make the approval date and the responsible approvers visible.

For example, Peksan’s product page for 038.016CTP10L and its associated PDF are starting documents for a technical discussion. Including this code in an enquiry does not mean that your selected bottle or filling conditions have been approved. Separately confirm the required option and the applicable data sheet version for your order. The technical data sheet on the product page and the direct PDF link below refer to the same product. [P1]

Record the trial conditions alongside the result

Do not leave “no leakage” as a standalone entry. State which cap–bottle combination was assessed, with which filling contents or defined simulant, and under which preparation and waiting conditions. For a line trial, record the line identity, closing method, settings used, trial time and any observed stoppages or nonconformities. For measurements, add the method, instrument identity, unit, measurement time and acceptance criterion agreed in advance.

Choose the test name with its scope in mind. The publicly available scope of ASTM D4991-25 addresses the resistance of empty rigid containers to leakage under a pressure differential. Do not treat that scope as evidence of filled-pack shelf life or as a universal leak-tightness guarantee for every cap. Determine with your technical team whether the method suits your own packaging; this article recommends no pressure, temperature or duration settings. [S1]

Separate sample approval from lot acceptance

Approval of a development sample does not mean that every cap in the next shipment has been inspected. NIST explains acceptance sampling as a way of deciding whether to accept or reject a lot based on samples randomly selected from it; its purpose is different from estimating the lot’s quality level. Therefore, alongside “sample approved”, record the incoming lot’s identity and the acceptance record applied to that lot. [S2]

ISO 2859-1:2026 covers sampling schemes indexed by AQL for lot-by-lot inspection by attributes; its third edition was published in January 2026. If a control plan refers to this standard, explicitly state the edition used. This article does not select a particular AQL, sample size or acceptance number; determine these within the framework of product risk, defect definitions and the control plan agreed between the parties. A standard’s name alone is not a certificate of conformity for a Peksan product. [S3]

A concise acceptance record to attach to the order

You can prepare a one-page attachment: product code and option; cap/bottle lot identities; data sheet and drawing revisions; trial conditions; characteristic inspected and method; acceptance criterion and result; deviations and their disposition; approvers and date. Instead of marking an unfilled field “acceptable”, state which information is missing.

Make the decision explicit: acceptance for the stated conditions, conditional acceptance subject to resolving defined outstanding items, or a repeat trial. If acceptance is conditional, clarify its scope, the outstanding work and who is responsible with the parties before ordering. Do not silently carry a report for a different sample or drawing version into a new order.

What should you reassess when something changes?

If the bottle finish drawing, cap option, sealing component, material or line conditions change, first assess whether the existing approval covers that change. Decide which checks to repeat based on the change’s impact; do not automatically require the same trial package for every change. Material reduction or switching to a different material does not automatically inherit the previous approval either; this statement makes no claim of environmental superiority.

When requesting a sample or quotation for 038.016CTP10L, share your current bottle drawing, chosen option, planned filling/closing conditions and expected acceptance records. The product page below provides access to the technical data sheet and quotation process. You can also open the 38 mm cap selection guide for dimensional matching and the capping–removal torque guide for torque report preparation from the source list.