Tempered Glass Fragmentation Test Log
Log tempered glass fragmentation tests in one place, from sample ID and break method to 50 x 50 mm fragment counts and final disposition. Use it to document conformance with ASTM C1048 and ANSI Z97.1 before release.
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Overview
This template is a controlled inspection log for tempered glass fragmentation testing. It captures the sample identity, test date and time, inspector, reference standard, break method, timed fragment count in a 50 x 50 mm area, photo evidence, and final pass/fail disposition.
Use it when you need to prove that a tempered glass sample produced the expected granular break pattern and met the minimum particle requirement referenced by ASTM C1048 and ANSI Z97.1. It is useful for incoming inspection, lot release, supplier verification, and failure investigations where traceability matters. The form is structured so an inspector can move from identification to test execution to measurement and then to review without skipping the evidence that supports the result.
Do not use this as a generic glass inspection sheet or for non-tempered products. It is not meant for annealed, laminated, or coated glass checks unless your internal procedure specifically calls for a fragmentation test. It also should not be used as a substitute for third-party certification, product listing, or any customer-specific compliance package. If a sample fails, the log includes space for non-conformance, corrective action, and disposition so the record stays useful after the initial test result is entered.
Standards & compliance context
- This template supports internal documentation of tempered glass break-pattern testing against ASTM C1048 and ANSI Z97.1 expectations.
- The controlled test and sign-off structure align well with ISO 9001-style quality records by preserving traceability, objective evidence, and disposition history.
- If the glass is used in regulated building applications, keep this log alongside any code or AHJ-required product documentation rather than treating it as the only compliance record.
- For customer-specific specifications, use the same log but update the acceptance criteria and reference standard fields so the record matches the contract or submittal package.
General regulatory context for orientation only — verify current requirements with counsel or the relevant agency before relying on this template for compliance.
What's inside this template
Inspection Header and Sample Identification
This section establishes traceability so the test result can be tied to the exact sample, lot, and standard used.
- Test date and time recorded
- Inspector name and role recorded
- Sample ID, lot number, and product description recorded
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Glass type confirmed as tempered sample
Confirm the specimen is identified as tempered glass before fracture testing.
- Reference standard documented
Test Method and Break Procedure
This section documents how the sample was broken, which is critical for repeatability and for defending the result during review.
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Break method documented and controlled
Record the method used to fracture the sample and any controlled setup details.
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Breakage performed under safe, controlled conditions
Verify the sample was broken in a controlled manner with appropriate PPE and handling.
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Fragment count recorded within 3 to 5 minutes after fracture
Enter the elapsed time used for the count.
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Photo evidence of fracture pattern captured
Upload a clear image of the fractured specimen and fragment field.
Fragment Count Measurement
This section captures the actual measurement that determines pass or fail, along with any visible anomalies in the fracture pattern.
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50 x 50 mm area identified on sample
Confirm the inspection area used for counting fragments is the specified 50 x 50 mm region.
- Fragment count within 50 x 50 mm area
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Fragments are small, granular, and uniformly distributed
Verify the break pattern is consistent with tempered glass fragmentation.
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Edge condition and any large shards documented
Record any abnormal shard size, edge behavior, or unusual fracture characteristics.
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Minimum particle requirement met
Pass when the fragment count in the 50 x 50 mm area meets or exceeds the minimum requirement.
Compliance, Non-Conformance, and Sign-Off
This section turns the test into a controlled quality record by documenting disposition, corrective action, and approval.
- Test result disposition
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Non-conformance documented when applicable
Describe any deficiency, out-of-spec fragment count, or test deviation.
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Corrective action or disposition recorded
Record re-test, hold, reject, or other disposition if the sample fails.
- Inspector signature
- Reviewer or QA approval
How to use this template
- Enter the test date, time, inspector name, role, sample ID, lot number, product description, and the reference standard before the break test begins.
- Confirm the sample is tempered glass and record the controlled break method you will use so the test can be repeated and reviewed later.
- Perform the break under safe, controlled conditions, then capture photo evidence of the fracture pattern immediately after fracture.
- Identify the 50 x 50 mm area, count the fragments within 3 to 5 minutes after breakage, and record any large shards, edge condition, or unusual distribution.
- Mark the result as pass or fail, document any non-conformance and corrective action if needed, and route the record for inspector signature and QA approval.
Best practices
- Use a consistent break method for the same product family so results are comparable across lots and shifts.
- Record the fragment count within the required 3 to 5 minute window, because delayed counting can distort the result.
- Photograph the full fracture pattern and the counted 50 x 50 mm area before fragments are disturbed or cleared.
- Tie every record to a unique sample ID and lot number so a failed result can be traced back to the exact production batch.
- Document edge condition and any large shards separately from the count, since abnormal break behavior can signal a process issue even when the count passes.
- Keep the acceptance criteria visible on the form so inspectors do not rely on memory or informal shop-floor rules.
- If a sample fails, open the non-conformance record immediately and note containment actions before the lot is released.
What this template typically catches
Issues teams running this template most often surface in practice:
Common use cases
Frequently asked questions
What does this tempered glass fragmentation test log cover?
This template records the full break-test workflow for tempered glass samples, including sample identification, controlled break method, fragment count in a 50 x 50 mm area, photo evidence, and final disposition. It is designed to document whether the sample meets the minimum particle requirements associated with ASTM C1048 and ANSI Z97.1. It also gives you a place to capture non-conformance and corrective action when a sample fails.
When should I use this log instead of a general inspection form?
Use this log when you need a traceable record of a tempered glass fragmentation test, not just a visual check. It is appropriate for incoming QC, production release, supplier verification, or complaint investigation where break-pattern evidence matters. A general inspection form usually misses the controlled break procedure, timed fragment count, and standard reference needed for audit-ready documentation.
Who should complete the test and sign it off?
The person performing the break test should be trained to handle glass safely and understand the counting method, while the reviewer or QA approver should verify the recorded result and disposition. In many facilities, this is a quality technician, lab technician, or QA inspector, with final review by a quality lead. If your process has a defined competent person or lab authority, assign that role here.
How often should fragmentation tests be performed?
The cadence depends on your quality plan, customer requirements, and product risk. Many teams use this log for each qualification sample, first article, lot verification, or after process changes such as furnace adjustments or supplier changes. If failures or drift appear, increase the frequency until the process is stable again.
Does this template replace formal lab testing or certification?
No. This log documents your internal test result and the evidence behind it, but it does not replace third-party certification, product listing, or any required conformity assessment. If your customer, spec, or jurisdiction requires external verification, use this log alongside those records. It is best treated as controlled quality evidence, not a substitute for legal or contractual requirements.
What are the most common mistakes when using a fragmentation test log?
The most common issues are unclear sample identification, counting fragments after the allowed time window, and failing to document the exact break method. Another frequent problem is recording only a pass/fail result without the actual fragment count or photo evidence. Those gaps make the record hard to defend during a customer audit or internal non-conformance review.
Can I customize this for different glass sizes or product lines?
Yes. You can add product-specific fields for thickness, coating, heat treatment batch, edge finish, or customer specification. If your organization tests multiple glass types, duplicate the template and tailor the acceptance criteria and notes fields so each version matches the product family. Keep the core elements intact so the record still shows traceability and method control.
How does this log fit into a quality management system?
This template fits naturally into ISO 9001-style document control because it captures objective evidence of inspection, traceability, and non-conformance handling. It can also support supplier quality programs by tying a test result to a lot number and corrective action record. If you use an electronic QMS, the log can be linked to NCR, CAPA, and approval workflows.
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