Reflectance vs Transmittance: What Is the Right Fit for Your Application?
When selecting a spectrophotometer, one of the most important decisions is whether your application requires reflectance measurement or transmittance measurement. While both methods evaluate how light interacts with a sample, they serve very different purposes depending on the material being tested.
What is Reflectance Measurement?
Reflectance measures the light that bounces off the surface of a sample.
It is typically used for:
- Opaque materials
- Solid products
- Surface color evaluation
- Appearance control
Common applications include:
- Paints and coatings
- Plastics and polymers
- Textiles
- Paper
- Food powders
- Building materials
Reflectance instruments often use integrating sphere technology to capture diffuse and specular reflection, ensuring reliable and repeatable surface color measurement.
If your product does not allow light to pass through, reflectance measurement is required.
HunterLab reflectance spectrophotometers such as ColorFlex L2 and Agera are designed for fast, reliable surface color evaluation in production and laboratory environments.
What is Transmittance Measurement?
Transmittance measures the light that passes through a sample.
It is used for:
- Transparent or translucent materials
- Liquids
- Glass
- Films
- Clear plastics
Typical applications include:
- Beverage color control
- Pharmaceutical solutions
- Optical materials
- Packaging films
- Transparent resins
Transmittance instruments evaluate clarity, haze, and internal color characteristics that cannot be measured from surface reflection alone.
HunterLab solutions such as the UltraScan VIS offer both reflectance and transmittance capabilities, making it ideal for manufacturers handling diverse materials.
How to Choose the Right Configuration?
Consider these three questions:
- Is the material opaque or transparent?
- Are you measuring surface color or internal color?
- Does clarity or haze impact product quality?
Reflectance = Surface color control Transmittance = Through-sample color & clarity analysis
Choosing the wrong method may result in misleading data and inconsistent quality decisions.
Supporting Manufacturers Across Industries
Dash Asia, in partnership with HunterLab, provides spectrophotometer solutions for:
- Coatings & construction
- Plastics & packaging
- Food & beverage
- Pharmaceuticals
- Chemical manufacturing
Beyond supplying instruments, we assist with:
- Application consultation
- Method selection
- Installation & training
- After-sales technical support
Our goal is to ensure you implement the right solution — not just any solution.
Unsure which configuration fits your material?
Contact Dash for a technical consultation and discover the right HunterLab solution for your process.
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