Technical Insight
Laser Marking POM Security Seals and Identification Parts
Candidate controls include Antimony Tin Oxide (ATO). For POM security seals, select the lowest robust mark window that preserves small features, hinge or strap function and tamper-evident geometry.
Author: Aurexene Materials Engineering Team · Last updated: 2026-08-28
Quick Answer
For POM security seals, select the lowest robust mark window that preserves small features, hinge or strap function and tamper-evident geometry.
Evidence scope: This page provides method-conditioned engineering guidance. It does not claim that one commercial grade is a drop-in replacement, universally superior, or qualified for a finished part without matched evidence.
Problem
For POM security seals, select the lowest robust mark window that preserves small features, hinge or strap function and tamper-evident geometry.
The decision boundary includes the complete host formulation, colour package, supplied additive form, compounding and moulding history, part geometry, delivered laser state and the measurement method. A result is not transferable when one of those conditions changes without review.
Mechanism
POM has a narrow balance between surface transformation and thermal damage; pigment, grade, thickness and repeated pulses change local decomposition and relief.
Laser marking is a coupled material-and-process response. Absorption and scattering determine where energy is deposited; pulse state, focus, overlap and path determine the local history; the polymer, pigments, fillers and geometry determine whether that history creates controlled contrast or a defect.
Tradeoff
Deeper or darker marking may improve visibility while weakening thin sections or altering the intended evidence of opening.
The useful condition is a feasible region with margin, not the single darkest coupon. Contrast, edge, surface integrity, unmarked colour, processing, mechanical function, durability and cycle time must be evaluated together.
Material Strategy
Use ATO as application-specific screening candidates. The list is not a performance ranking and does not establish equivalence between chemistry families.
- Freeze the host grade, colour, thickness, geometry and acceptance criteria.
- Normalize active-content and supplied-form differences or explain why another comparison basis is used.
- Screen loading and laser variables in a bounded matrix and preserve failed runs.
- Confirm the selected window across relevant lots, parts, tools and exposures.
Recommended Architectures
| Architecture | Use when | First validation gate |
|---|---|---|
| Matched baseline | The current material, colour and laser recipe require a reproducible reference. | Marked-seal functional retention |
| Bounded screening ladder | Loading, supplied form, colour or delivered laser variables must be separated. | POM grade and colour; thin-section geometry; mark location; contrast and relief; seal function after marking |
| Production confirmation | A candidate window must transfer across lots, geometry, tools or lifecycle exposures. | Margin, repeatability, failures and requalification triggers |
Controls That Must Stay Visible
| Order | Control | Review rule |
|---|---|---|
| 1 | POM grade and colour | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 2 | thin-section geometry | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 3 | mark location | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 4 | contrast and relief | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 5 | seal function after marking | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
Measurement & Validation
Primary response: Marked-seal functional retention.
Method: Test code readability and surface damage on the actual seal, then perform the declared mechanical or tamper function before and after conditioning.
Report the unit or grade together with instrument or verifier geometry, specimen state, conditioning, repeats, distribution or uncertainty, failures and the acceptance limit. A scanner pass, photograph or supplier representative value is not a substitute for the declared method.
Qualification Boundary
- Record exact material and lot identities, active-content basis, carrier and colour package.
- Record compounding, drying, moulding, thickness, surface and geometry.
- Record source wavelength, pulse state, spot or focus, speed, hatch, passes, field and calibration.
- Measure marked and unmarked controls using the declared method.
- Confirm production and lifecycle variation, then define requalification triggers.
Primary Sources and Standards Boundary
No external standard establishes product-grade performance for this question. Use reviewed grade documents and matched laboratory or production evidence.
Related Products
Related Applications
Related Comparisons
No reviewed comparison page is required for this decision. Keep candidate comparisons inside a matched test matrix.
Downloads & Engineering Support
Need to apply this boundary to a grade, formulation, test method, or production route? Discuss it with the Aurexene Materials Engineering Team.