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"Spectrophotometer Best Practices"

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"Guide to Overcoming Color Challenges in Plastic Manufacturing"

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"HunterLab’s Global Commitment: Stability, Service, and Support Amid Supply Chain Pressures"

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"What Does Calibrating a Spectrophotometer Do?"

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"How Does Color Affect Quality Control in Tomato Production?"

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"Best Practices to Measure the Color of Candy"

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"Best Practices for Measuring the Color of Plastics"

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Spectrophotometer Best Practices

Posted on May 20, 2025 by HunterLab

Spectrophotometers are invaluable to many industries, ranging from the food to plastics industries and beyond, delivering the color consistency necessary to streamline supply chain efficiencies and maximize product quality. The key to ensuring reliable performance and color measurement quality is knowing how to properly maintain a spectrophotometer.

What Is the Function of a Spectrophotometer?

A spectrophotometer scientifically measures the color of materials using a light source, wavelength-selective optics, sensors, and software to convert emitted energy to an industry-standard color scale. This measurement enables companies to verify the quality and consistency of their products, ingredients, and raw materials. The device mimics how the human eye sees color but eliminates error-prone manual visual observations for higher accuracy.

Best Practices for Using and Taking Care of Your Spectrophotometer

Spectrophotometers must undergo the proper routine maintenance to deliver the most precise and accurate measurements. With the right standardization and care, you can ensure your color spectrophotometer performs at its best.

1. Perform Routine Maintenance

A well-maintained device provides the most accurate and reliable readings. Maintenance begins with a thorough cleaning. No matter how well-calibrated your device is, it won’t deliver accurate or consistent readings if it isn’t clean. That’s why it’s vital to ensure your spectrophotometer is free of dirt, dust, grime, and other contaminants that can obscure measurement results.

When cleaning your equipment, it’s crucial to follow the best practices outlined in your user manual to avoid damaging the device and invalidating your warranty. Avoid using any harsh or abrasive tools or substances when cleaning your spectrophotometer.

Cleaning frequency varies based on the components. The exterior of the sensor and mounting generally require weekly cleaning. If your work involves messy samples that contact the sensor, you may also have to clean between measurements.

You should also consider your environment when determining cleaning frequency. For example, a unit stored in a dusty, poorly ventilated closet will require more routine cleanings than one contained in an air-conditioned office.

Other routine maintenance checks include:

  • Inspecting and cleaning the power cord
  • Verifying the optics are clean and in good condition
  • Testing general structures like the device touch screen or buttons

Beyond these general checks, each model operates differently. Check the owner's manual for additional maintenance procedures specific to the device.

Posted in Benchtop

Guide to Overcoming Color Challenges in Plastic Manufacturing

Posted on May 20, 2025 by HunterLab

Plastic manufacturing has grown significantly since the 1950s, surpassing that of any other material. Today, plastics see use in markets ranging from automotive to goods packaging to food and beverage production. Plastic color is and will continue to be pivotal as the primary determinant by which consumers judge product quality and desirability, yet accurately quantifying it comes with unique challenges.

Common Challenges in Plastic Color Measurement

Typical plastic color measurement challenges include the following.

Natural Yellowing

Virgin plastic resins naturally yellow during processing as a result of oxidation. Additional yellowing can occur with age or exposure to ultraviolet rays. To achieve clear or almost clear end products, manufacturers must add optical brighteners that fluoresce on the blue side of the visible spectrum to negate the yellowness. That translates into almost all plastic goods containing at least some percentage of optical brighteners. As a result, these materials inherently fluoresce and introduce more complexity to achieving the desired clarity and visual chromatic qualities.

Regulatory Pressures

Government entities worldwide are passing ever-stricter regulations on the percentage of post-consumer recycled plastic that must be used in new plastic production to prioritize a more circular economy. An increase in the amount of recycled plastic used causes a corresponding rise in the amount of optical brighteners and other additives in feedstock that manufacturers must adjust for.

These challenges make accurate color measurements even more pivotal since one variation in the input can substantially impact the outcomes.

ESG Initiatives

In addition to governmental action, modern plastics manufacturers are feeling similar pressures from their stakeholders. Consumers, employees, and investors alike increasingly call for more sustainable practices and transparency in environmental impact.

To account for these pressures, many companies enact Environmental, Social, and Governance (ESG) initiatives that help achieve the six principles of a more circular economy. These pillars include minimizing waste, maximizing resources, saving energy, and reducing carbon footprint.

How to Resolve Color Measurement Challenges in Plastics

Fortunately, there are several steps you can take to resolve color measurement challenges with plastics production.

Posted in Plastic

HunterLab’s Global Commitment: Stability, Service, and Support Amid Supply Chain Pressures

Posted on May 20, 2025 by HunterLab

HunterLab’s Global Commitment: Stability, Service, and Support Amid Supply Chain Pressures

As global trade conditions continue to evolve, businesses across industries are navigating new levels of complexity. At HunterLab, we understand how these pressures can affect your planning, operations, and service expectations. That’s why we’re committed to ensuring that our color measurement solutions remain consistent, available, and fully supported — no matter the global environment.

For over 70 years, HunterLab has helped customers around the world maintain color quality with precision instrumentation and reliable service. In times of uncertainty, that commitment only grows stronger.

Why Global Conditions Matter in Color Measurement

Whether you’re formulating products in food, plastics, chemicals, or textiles, accurate color measurement is essential to brand consistency and quality control. But behind every precise measurement tool is a complex global supply chain — and today, that landscape is changing rapidly.

Businesses are feeling the effects of:

- Increased transportation costs

- Longer lead times due to port and customs delays

- Supply constraints for critical electronic and optical components

- Shifts in international trade policies and sourcing strategies

This environment has the potential to impact availability and cost structures across the instrument manufacturing industry. But at HunterLab, we are actively working to minimize that impact for our customers and partners.

Posted in Color Measurement

What Does Calibrating a Spectrophotometer Do?

Posted on May 20, 2025 by HunterLab

Spectrophotometers are powerful solutions for objectively and scientifically quantifying color data in products. These devices capture measurements for comparison against a known scale or index to ensure goods' color falls within acceptable tolerances, supporting higher quality. Calibration is a crucial factor in ensuring the equipment delivers — and continues to provide — precise, accurate color measurements.

What Is Spectrophotometer Calibration?

Calibration of a spectrophotometer is a process for adjusting the device's sensitivity to certain wavelengths of light. This precise adjustment helps verify that the unit is measuring wavelengths as intended and quantifying color correctly. It substantially differs from standardization, a process that end users perform in their facilities.

Posted in Instruments And Software

How Does Color Affect Quality Control in Tomato Production?

Posted on May 20, 2025 by HunterLab

Tomatoes are essential in meeting global nutritional needs, improving health, and generating economic impact for communities worldwide. Billions depend on this crop — the second most grown vegetable on Earth — for better physical well-being and financial gain. As a result, color is a critical factor in quality control for tomato manufacturing.

The Role of Color in Tomato Quality Control

Tomato color influences customer preference, quality perceptions, grading classifications, and market value.

Meeting Consumer Preferences

Assessing color is one of the primary ways consumers make buying decisions. They see a tomato with a rich, red hue as a promise that it was harvested at the peak of freshness and flavor. Unripe ones and heirloom green varietals hint at a delightfully tart taste, perfect for a favorite Southern dish. Similar color associations exist for tomato-based products, such as tomato paste and sauce.

Beyond taste, tomatoes are prized for their nutraceutical content — they're high in several vitamins and minerals, antioxidants, and fiber that offer physical benefits. The more their color meets or exceeds customer expectations, the higher the consumer perceptions of the product's safety and quality. Increased confidence in those traits directly translates into a rise in purchase likelihood.

Conforming With Standards

Modern tomato processing facilities are covered entities under Title 21 of the Code of Federal Regulations, which subjects them to oversight by the Food and Drug Administration and the United States Department of Agriculture (USDA). As a result, they must follow Current Good Manufacturing Practices, which include measuring color as part of quality assurance. The USDA sets color tolerances for tomatoes to help determine their grade, meaning quantifying color is essential for proper classification.

Those operating under voluntary frameworks may also need to evaluate color for conformance with the guidelines. For example, the Safe Quality Food standards specify color analysis as a vital quality assurance measure under several codes.

Leveraging Financial Potential

Businesses that thrive often do so by maximizing their profitability, and color quality is a key driver in that quest. Generating high consumer quality perceptions through color can help goods fetch premium prices, as buyers with increased product confidence are frequently willing to pay more for extra peace of mind.

For companies seeking to expand, color quality becomes even more essential. Tomatoes and tomato-based products must meet specific standards to access new markets that can help spur organizational growth.

For example, the EU has multiple standards that apply to imported tomatoes and tomato-based products. These help establish the minimum grades acceptable for sale within the bloc, and color is a primary determinant in that classification. Individual EU countries may also impose their own standards for the crop and its processed goods. Accurately quantifying color to prove conformance with the standards makes it easier to access these high-value markets.

Posted in Food

Best Practices to Measure the Color of Candy

Posted on May 08, 2025 by HunterLab

Color is one of the first things that comes to mind when thinking of candy, as this sweet comes in a rainbow of vibrant hues. The importance of appearance in candy means that those who manufacture it should follow industry best practices to ensure an enjoyable consumer experience.

Consider the Importance of Color

Before you start measuring, note why color matters in candy. Consumers judge food based on appearance, and color sets expectations for quality and taste. Beyond those expectations, color influences whether customers buy a product. They repeatedly turn to brands that offer color consistency as a reliable indicator of quality.

Posted in Food

Best Practices for Measuring the Color of Plastics

Posted on May 08, 2025 by HunterLab

Color consistency can play a major role in whether a consumer chooses one brand's product over another. That means businesses that work with plastic, either as a product or a packaging material, need to pay close attention to their color formulas and the consistency of their outputs. 

Quality control specialists in every industry have recognized the benefits of using a spectrophotometer to measure product colors, ensuring better consistency and branding — and alignment with sustainability goals.

What Factors Affect Plastic Color?

Your plastic may look right as you process it, but will it look the same when it hits the shelves? Product appearances can differ from store to store and shelf to shelf due to factors like:

  • Light: All color is based on the way light reflects off an object. Understanding how color changes under different light sources can help you see why a color measurement tool is crucial in maintaining consistency.
  • Opacity: Plastic ranges from being totally opaque to transparent, and variations in opacity can change the way its color is perceived. The same coloration formula can produce different results across multiple pieces of plastic based on the level of transparency each piece holds. 

  • Gloss: Plastic can be matte or glossy. The glossier a piece of plastic is, the more likely the finish is to affect the product's appearance. 

Achieving uniformity, repeatability, and consistency is the best way to ease consumer scrutiny. Fortunately, powerful solutions exist to help you capture, quantify, and track color accurately to maintain your high quality standards.

Posted in Color In Plastics
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