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"Challenges in Color Matching: Using Spectrophotometers to Identify Illuminant Metamerism"

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"Car Paint Color Matching After An Accident Using A Spectrophotometer"

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"Biomedical Optics and Spectrophotometry: Shining a Light on the Future of Health Care"

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"Best Practices for Measuring the Color of Recycled Pellets"

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"Best Practices for Measuring the Color of Poultry"

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"Benefits of In-Process and In-Line Color Measurements"

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"Beer Color Analysis: Setting the Standards for Quality Using Spectrophotometric Technology"

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Challenges in Color Matching: Using Spectrophotometers to Identify Illuminant Metamerism

Posted on Mar 19, 2026 by HunterLab

This chart illustrates how metameric colors appear the same under certain illuminants and drastically different under others. Image Source: Flickr user Johannes Ahlmann

Color matching is a basic but critical component of product manufacturing across industries, and manufacturers go to great lengths to ensure color consistency throughout their production process. Sometimes, this is fairly straightforward, particularly if a product is being manufactured using a single material and pigmentation source. However, when the color of multiple, different product types must be visually identical or a product is being assembled using a variety of materials undergoing unique manufacturing processes, color matching becomes more challenging. One of the primary obstructions to accurate color matching in these situations is illuminant metamerism, which must be identified through the sophisticated analytical capabilities of spectrophotometers.

Posted in Color Measurement

Car Paint Color Matching After An Accident Using A Spectrophotometer

Posted on Mar 19, 2026 by HunterLab

Being able to match a vehicle color perfectly is the mark of a high-end auto body repair shop. Image Source: Unsplash user Josh Rinard

When a consumer turns to a body shop for car repairs after a crash, their goal is to get their vehicle back in the best condition possible. Ideally, they want it to look like their vehicle was never in an accident in the first place. In part, this is driven by financial considerations; after a vehicle is in an accident, its value can drop by as much as 10%.1 This diminished value can be a significant issue and a point of contention between car owners and insurers, as it limits resale options for a vehicle. Of course, even owners who want to keep their vehicle typically also want to remove any indications of damage, particularly if the car is rare, valuable, or has sentimental value. As a result, the auto shops that can return a car to its pre-accident condition are in high demand.

A significant part of the post-accident repair process is ensuring a seamless paint job without requiring the entire vehicle be repainted. For body shops, this means that paint matching must be a top priority. While you may have a good idea of the base color of the vehicle, matching that color identically virtually impossible without the use of modern technology. As such, spectrophotometers are essential to pinpoint the perfect color match.

Without proper color matching, a seamless collision repair job is not possible. Image Source: Unsplash user Ivan Sean

Posted in Color Measurement

Biomedical Optics and Spectrophotometry: Shining a Light on the Future of Health Care

Posted on Mar 19, 2026 by HunterLab

Biomedical optics offer non-invasive alternatives to many healthcare procedures through the use of spectrophotometric technology. Image Source: Flickr user frankieleon

Biomedical optics very well may be the future of our health care industry. Whether you are an athlete, patient, or parent of an infant, biomedical optics will most likely play a significant role in your health care or that of someone you love in the near future. Biomedical optics utilize NIR (near-infrared) spectroscopy in a number of ways and provides a safe, non-invasive, and non-destructive method of analysis for a variety of medical needs.

Posted in Color Measurement

Best Practices for Measuring the Color of Recycled Pellets

Posted on Mar 19, 2026 by HunterLab

Plastic recycling is essential as the world continues to emphasize sustainability. Recycled plastic pellets from post-consumer and industrial waste offer value in various applications, including traffic cones, plastic chairs, detergent bottles, trash cans, and flower pots. 

Ensuring consistent color in products made from reprocessed materials can be complex. Here at HunterLab, we offer a range of solutions to measure the color of recycled pellets for precise results.

Challenges in Measuring Recycled Materials

Quantifying color in recycled plastic pellets presents unique challenges, such as:

  • Material variations: Recycled pellets contain plastics from different sources, resulting in color variations. They are often blended to achieve a desired color. Color measurement can help ensure consistent blending ratios and a uniform final product color.
  • Contamination: Foreign materials present in recycled pellets can affect color measurement accuracy. Implementing measures to minimize contamination in recycled pellets can improve color consistency.
  • Physical form: Recycled pellets vary in size, shape, and opacity, affecting how light interacts with the material during measurement. These properties demand the right equipment and measurement methods for precision and consistency.

Best Practices for Precise Color Measurement

Spectrophotometers/colorimeters are the industry standard for precise color measurement. These devices analyze how light interacts with a sample and quantify the intensity of wavelengths across the visible spectrum to translate color into numbers. The following best practices will help you make the most of this technology to support your goals:

  • Prepare and present samples accurately and consistently: It is crucial to maintain consistent sample preparation. Per ASTM D6290-19, operators must use a clean, optically clear and scratch-free sample cup filled to a sufficient depth to ensure effective opacity. Additionally, covering the sample cup with an opaque cover is crucial to block ambient room light and prevent external interference during measurement.
  • Measure across a large area: The larger the sample area measured, the more precise and repeatable the results. Refer to ASTM D6290-19 Standard Test Method for Color Determination of Plastic Pellets for guidance on proper measurement methods. Specifically, the standard recommends taking three separate measurements using a "dump-and-fill" technique with fresh pellets to ensure an accurate and representative average.
  • Determine the relevant color spaces: Choose a shared color space to establish communication throughout the production chain.
  • Leverage color quality control software: Ensure your spectrophotometer integrates with or includes built-in color quality control software. This technology allows you to compare the color of your recycled pellets to target specifications or predefined color ranges.

Posted in Plastic

Best Practices for Measuring the Color of Poultry

Posted on Mar 19, 2026 by HunterLab

Appearance is the first factor consumers judge when purchasing meat products — especially poultry. Consumers often rely on consistent color for poultry safety and freshness. Here are some tips when testing poultry color for meat acceptability.

Posted in Color Measurement

Benefits of In-Process and In-Line Color Measurements

Posted on Mar 19, 2026 by HunterLab

In-process and in-line color measurements refer to real-time color monitoring during the manufacturing process that alerts operators when colors move out of the acceptable specifications. With in-process monitoring, operators can correct their equipment before faulty products are manufactured so little to no material is wasted. In-process color measurement is essential to saving money during the manufacturing process and keeping your brand image consistent, recognizable and reliable.

Which Industries Use In-Line Color Measurements?

Many industries use the power of in-line color measurement for quality assurance and to uphold brand standards. The six major sectors that use spectrophotometric in-line color measurements are:

  • Plastics industry
  • Paper industry
  • Coil coating industry
  • Automotive industry
  • Glass and textile industries

These industries use in-line color measurement throughout the manufacturing process for quality control. For specialized requirements such as plastic extrusion molding, identifying the products’ exact shade is critical to operations, and this equipment can meet industrial requirements. By measuring in-line color, you can effectively manage demanding measurement tasks and tight tolerance standards for color identification.

In-Process and In-Line Color Measurement Capabilities

At the advent of color measurement technology, analysts used densitometers to measure process colors using predefined density filters. Different sensor models work optimally with different measurement tasks within the plastics industry, such as transparent film versus structured surfaces.

In-Line Color Measurement

With in-line color measurement systems, you can use several different features to optimize day-to-day operations:

  • Accurate measurement results even on curved or structured surfaces
  • Reflection spectrum comparison capabilities for unique identification
  • Rapid measurement speeds
  • High degree of accuracy for laboratories and various plastics industry applications

Posted in Color Measurement

Beer Color Analysis: Setting the Standards for Quality Using Spectrophotometric Technology

Posted on Mar 19, 2026 by HunterLab

Beer comes in a variety of colors and flavors. Continuous color monitoring throughout the brewing process guarantees better results in order to meet outcome expectations. Image Source: Flickr user manguzmo

Well, its official. My friend has finally jumped on the home-brewing bandwagon of beer makers. Along with a handful of other middle-aged friends, he has invested in the proper equipment, reorganized the garage, and attended all of the classes that teach about various brewing methods, beer taste, and beer color. You may wonder what beer color has to do with brewing methods and taste. Surprisingly, beer color analysis is a very important process that is used to monitor the beverage in order to develop the ideal taste, texture, and appearance. Professional beer manufacturers understand the importance of beer color and rely on spectrophotometric technology to maintain quality and consistency in their products, and many craft brewers are beginning to see the value of color measurement at well.

Posted in Color In Food Industry
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