Technical Insight
Selecting an Additive by Base Polymer Color and Pigment Package
Candidate controls include Antimony Tin Oxide (ATO). Choose the additive after measuring the unmarked colour and pigment package because the same laser-active material can produce different polarity, contrast and damage in natural, white, yellow, red or black systems.
Author: Aurexene Materials Engineering Team · Last updated: 2026-08-28
Quick Answer
Choose the additive after measuring the unmarked colour and pigment package because the same laser-active material can produce different polarity, contrast and damage in natural, white, yellow, red or black systems.
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
Choose the additive after measuring the unmarked colour and pigment package because the same laser-active material can produce different polarity, contrast and damage in natural, white, yellow, red or black systems.
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
Pigments and fillers set reflectance, absorb or scatter the laser and change local heat flow around active particles.
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
A route that improves contrast can move the base colour outside tolerance or require a different laser recipe for each colour SKU.
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 Black Titania and 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. | Colour-conditioned additive selection |
| Bounded screening ladder | Loading, supplied form, colour or delivered laser variables must be separated. | base colour target; pigment chemistry and lot; filler and opacity; mark polarity; base-colour tolerance |
| 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 | base colour target | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 2 | pigment chemistry and lot | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 3 | filler and opacity | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 4 | mark polarity | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
| 5 | base-colour tolerance | Hold the other declared formulation, process, geometry and measurement conditions constant before attributing an effect. |
Measurement & Validation
Primary response: Colour-conditioned additive selection.
Method: Use matched colour formulations and active loading; measure baseline CIELAB or reflectance, mark response, damage and post-ageing colour.
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
- ISO/CIE 11664-4:2019 — CIE 1976 L*a*b* colour space — Defines CIELAB calculation; instrument geometry, illuminant, observer, aperture and specimen state must accompany results.
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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.