Glass Bottle Defects: A Buyer’s Receiving and Supplier Report

A defect report without a traceable bottle and lot leaves the supplier little to investigate. Record glass bottle defects by location and visible appearance, retain the sample identity, and let the quality owner determine containment and disposition under the agreed specification.

This guide is for buyers and receiving teams who need to report an anomaly in empty bottles or on a filling line. Use the receiving report below to connect the observation, batch, mold marking, inspection station and supplier response. It does not set acceptance limits or diagnose a manufacturing cause from a photograph.

Start with containment and a traceable observation

If you find suspected broken glass, a crack or an internal glass projection, follow your site’s glass-control and hold procedure and notify the quality owner. That owner should define the affected stock or production scope; one suspect bottle does not establish where the affected lot begins or ends. Avoid handling sharp areas or continuing a line trial to see whether the bottle will fail.

For the initial report, work through this sequence:

1. Identify the material. Record the supplier, bottle code and drawing revision, delivery, batch and pallet or case reference. Keep the original packaging identification associated with the sample.
2. Describe the observation. Give the bottle region and visible feature. Use “suspected” where identification is uncertain, and leave the cause unassigned.
3. Preserve the evidence. Give each retained bottle a sample ID and associate it with photographs, inspection conditions and the discovery point.
4. Record the decision owner. Log the hold reference, supplier investigation request and the person authorized to decide disposition. A supplier explanation and an internal release decision belong in separate fields.

This sequence is an editorial reporting aid. Your approved inspection plan determines sampling, escalation, handling and acceptance.

Locate the feature on the bottle

Use a region name before choosing a defect name. The location vocabulary below follows Bucher Emhart Glass’s Glass Container Defects: Causes & Remedies (2024, pages 2–5). A seam is a normal result of mold components meeting; whether its condition is acceptable depends on the agreed standard.

Read this location map from the top of the bottle downward. The table supplies the region names for the photograph and for your report.

For a closure-related observation, also record the designated neck finish and closure. A photograph of the threads alone does not identify the drawing revision or demonstrate sealing performance.

Use defect names as descriptions, with confirmation pending

Emhart’s manual groups defects by region and gives definitions, possible causes and remedies. The short vocabulary here helps make a report searchable; it does not assign severity. Where a feature is unclear, write a plain description such as “bright line on outside shoulder” and ask the supplier to confirm the term.

These are paraphrases of the manual’s relevant entries, including pages 16, 32, 50, 58, 106 and 148. “Seed” and “blister” are not numerical size bands in this guide. Neither a bubble nor an inclusion should receive a universal pass or fail label from this table.

Photograph the location and keep the sample identifiable

A close-up needs context. Take a whole-bottle view that identifies the region, followed by a close view of the feature. Record whether the bottle was empty or filled, dry or wet, and viewed with light behind it or reflected from its surface. If the feature appears only at a certain angle, preserve that view and describe it. Do not turn an apparent size in an unscaled photograph into a measurement.

TricorBraun’s reporting guide recommends a clock reference for communicating position. For your own report, explicitly define the viewing direction and zero reference. For example, agree that a top view looking down through the mouth uses a photographed mold seam as 12 o’clock. Record which seam you used; if no suitable reference is identifiable, leave clock position blank and use an annotated copy of the photograph. Keep the original image too.

Record the mold or cavity marking as read, with its photograph. Ask the supplier to interpret an unfamiliar code. Matching markings can help organize an investigation, but do not by themselves prove a shared cause.

Use your site’s safe retention and shipping procedure. Associate each retained bottle with its sample ID, collection point and photographs; record any cleaning, handling or destructive examination that changes it. The sample’s condition when first observed should remain distinguishable from later investigation work.

Receiving and supplier-response record

Copy this worksheet or download the blank CSV record. Use one record per sample or clearly defined observation group, and link related records under the same incident reference. Blank cells are intentional: enter “Unknown” where appropriate rather than infer a batch, measurement or cause.

Keep “quantity examined” attached to its selection method. Counts from bottles deliberately selected because they looked unusual do not estimate the defect rate of a delivery. The record contains no acceptance calculation or implied sample-size requirement. Keep the agreed criteria in the controlled bottle specification.

Example of wording, not an incident report: “Suspected check at outside shoulder; visible with reflected side light; sample, batch and marking fields pending.” This states the observation and the missing evidence without declaring a forming fault.

Ask for findings that close the investigation

Send the report through your established supplier-quality process. Ask the supplier to confirm the defect term, identify what evidence supports its cause assessment, define its affected production scope, and explain containment and corrective action. Ask how any corrective action was verified for the relevant bottle and production, rather than accepting “machine adjusted” as a complete response.

Emhart’s manual lists multiple possible causes for many defects. Its manufacturing remedies are troubleshooting references for qualified production personnel; a receiving photograph cannot select the correct adjustment. The glass manufacturing process guide explains the production stages if you need that context.

If the anomaly passed an inspection station, record the station and available reject or inspection evidence, then review the inspection scope with the responsible team. Use the bottle inspection systems guide for the separate question of what each station is intended to check. The presence of an inspection machine does not establish that this particular feature was tested successfully.

Close the record only when the authorized quality owner has documented disposition under the applicable specification and site procedure. Keep the supplier response and supporting evidence attached to the original observation.

Sources and limits

This is a general editorial worksheet for reporting glass-container anomalies. It supplies no AQL, defect-size limit, release rule, equipment detection limit or pharmaceutical qualification. The photographs show bottle features and sample arrangements; they are not records of a tested lot. Site quality procedures and agreed specifications govern the actual decision.

• Bucher Emhart Glass, Glass Container Defects: Causes & Remedies, BR0060RevA, published July 2024; accessed October 15, 2026. Introduction, container anatomy and the named defect entries support the terminology and the limits on inferring causes.
• TricorBraun, How to Identify and Report Packaging & Bottle Defects, accessed October 15, 2026. Supports using location and a clock reference in a report. Its example severity classes are not adopted as acceptance criteria here.