Discoloration Analysis Testing Services
Read more about the discoloration analysis and its significance in understanding the causes of color changes.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
What Is Discoloration Analysis?
Analysis of discoloration is used to evaluate changes in color and appearance of materials due to environmental exposure, chemical interaction, aging, or processing conditions. The test helps identify causes of color variation such as oxidation, UV degradation, contamination, or thermal effects.
This analysis is widely used in plastics, coatings, textiles, metals, and consumer products to ensure aesthetic quality and material stability. It supports product development, failure analysis, and quality control by quantifying color changes and identifying degradation mechanisms.
Applications and Benefits of Discoloration Analysis Testing
Scope
Analysis of discoloration evaluates the extent and cause of color change in materials using visual and instrumental techniques. The test helps determine whether discoloration affects performance or product acceptance.
The test evaluates:
- Color change due to environmental exposure
- Effects of UV, heat, and oxidation on materials
- Surface degradation and chemical reactions
- Uniformity and consistency of color
- Impact of discoloration on product quality
Applications
- Plastic and polymer materials
- Coatings, paints, and finishes
- Textile and fabric products
- Metal surfaces and treated materials
- Consumer goods and packaging
- Automotive and construction materials
Benefits
- Provides a quantitative measurement of color variation
- Helps identify root causes of discoloration
- Supports product quality and consistency
- Assists in improving material formulations
- Enables comparison of material performance
Our Testing Procedure
Sample Preparation
Samples are cleaned and conditioned to ensure accurate color measurement.
1Initial Measurement
Baseline color values are recorded using a color measurement instrument.
2Exposure or Treatment
Samples are subjected to environmental or chemical conditions if required.
3Data Recording & Evaluation
Color changes are measured and analyzed using standard color difference metrics.
4Test parameters and requirements
| Parameter | Details |
|---|---|
| Applicable Materials | Plastics, coatings, textiles, metals |
| Measurement Method | Spectrophotometric color analysis |
| Color Space | CIE Lab* system |
| ΔE Range | 0.1 to 10+ (color difference units) |
| Light Source | D65 standard illuminant |
| Measured Outputs | Color values (L*, a*, b*) and ΔE |
- Spectrophotometer or colorimeter
- Controlled light source (D65)
- Sample preparation tools
- Environmental exposure chamber (optional)
- Surface analysis tools
- Data acquisition and analysis software
Equipment and Instrumentation Used for Testing
What You Receive: Test Report, Data, and Certification
- Color measurement data (L*, a*, b*)
- ΔE (color difference) values
- Visual and instrumental comparison results
- Discoloration analysis and trends
- Test condition summary
- ASTM compliance report
Discoloration Analysis FAQs
Color change testing determines the difference in color between a material and a reference or between an unexposed and exposed specimen. Results can be expressed using color-difference metrics such as ΔE, CIELAB, CIEDE2000, CMC, or CIE94, depending on the agreed test method.
Testing can be performed on materials such as painted and coated panels, plastics, textiles, and other opaque products where appearance and color stability are important. The appropriate measurement procedure depends on the material's surface characteristics and intended application.
A specimen's color is measured before and after exposure using an appropriate instrumental colour measurement system. For weathering studies, samples may first undergo UV, moisture, or condensation exposure, such as under ASTM D4587, followed by instrumental evaluation of color change.
ΔE represents the magnitude of color difference between a test specimen and its reference. A lower ΔE generally indicates a smaller measured color change, while acceptance limits should be established for the specific product because visual acceptability can also depend on gloss, texture, hue, and other appearance factors.
Discoloration testing helps manufacturers evaluate color stability, weathering resistance, batch consistency, and long-term appearance. It is particularly valuable for coatings, plastics, automotive components, building materials, and other products where maintaining their original appearance is critical.
Why Choose Infinita Lab for Discoloration Analysis Testing?
At the core of this breadth is our network of 2,000+ accredited laboratories across the USA, offering access to over 10,000 testing methods and analytical services. From advanced materials characterization (SEM, TEM, RBS, XPS) to mechanical, chemical, environmental, biological, and standardized ASTM/ISO-compliant testing, we deliver unmatched flexibility, specialization, and scale. You are never limited by geography, facility, or methodology — Infinita Lab connects you to the right expertise and testing solution, every time.
Looking for an Accredited Partner for Discoloration Analysis Testing?
Send query us at hello@infinitalab.com or call us at (888) 878-3090 to learn more about our services and how we can support you.
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