Tomato Colour Classification Image Analysis Increases Quality in Ketchup

Spectrophotometers use light absorption data to determine the quality of fresh tomato products and help identify ripening disorders. Image Source: Flickr user U.S. Department of Agriculture (CC BY 2.0)

People with kids would probably agree that ketchup is the secret ingredient to improving the diets of young children. With it, you can convince almost any picky toddler to try new foods. But this love isn’t limited to the juvenile palate—just look at diners, restaurants, and fast food establishments across the country. From specially formulated bottled products to mass produced foil-lined packets, ketchup has embedded itself in American cuisine.

But with high demand for the condiment comes a volume of production that requires rigorous quality control. The competitive nature of the market has made it imperative for manufacturers to choose the best colour monitoring systems to ensure that their fresh tomatoes translate into high-quality ketchup products. With advanced spectrophotometry and tomato colour classification image analysis, you can develop a highly efficient system for condiment production, ensuring both quality and consistency.

Using Colour Analysis to Determine the Quality of Fresh Tomatoes

Because colour is a sign of quality in fresh fruits and vegetables as well as in the foods that are processed from these ingredients, the final colour outcome of any tomato ketchup is, of course, directly related to the colour quality of your fresh tomato product, with “colour and colour uniformity contribut[ing] directly to quality and marketability”1.  Measuring the colour uniformity of fresh tomatoes can also be used to identify ripening disorders such as YSD (yellow shoulder disorder)2 that can degrade the quality of tomato ingredients.

Tomato colour classification image analysis simplifies the colour grading process by providing quantifiable data that identifies both high and low-quality products which are otherwise undetectable to the human eye. With advanced spectral technology, light absorption values can measure the lycopene and beta-carotene contents of your product to detect major tissue quality issues and reduce the number of YSD tomatoes in production batches.

Tomato Grading and Colour Scales

Colour not only provides the visual appeal necessary for consumer acceptance, it is the foundation for the USDA Processed Products Standards and Quality Certification program, which classifies tomatoes and tomato-based products according to the colour quality of the fruit, setting a graded scale for colour saturation3. These colour scales do more than provide the basis on which final colour outcome is predicted—they are also used for lycopene content analysis and nutritional value justification.

And, as new technology continues to increase the value and efficiency of tomato production facilities, spectrophotometers have become the tomato industry’s basis for evaluation.

Advances in spectral technology offer the ability to look beyond skin colour assessment and can provide data on ripening conditions and nutrition value content. Image Source: Flickr user darwin Bell (CC BY 2.0)

From the first HunterLab D-25 A spectrophotometer, which set the original “gold standard” for establishing tomato scores, to the advanced capabilities of spectral technology today, these instruments have increased the quality and production standards of many of the world’s major ketchup manufacturing plants.  Today, spectrophotometers are used to evaluate raw tomato ingredients, monitor colour changes throughout processing, assess changes in colour due to storage conditions and/or thermal exposure, and set tolerances for final colour outcome.

Leading the Industry in Colour Evaluation

HunterLab was the first company to receive USDA approval for the instrumental analysis of tomato colour and continues to be a leading name in colour measurement among manufacturers of ketchup and other tomato-based products. Our commitment to innovation in this field has led to improvements in tomato growth and efficiency as well as new research on the measurement of nutritional content and value. Major ketchup producers rely on HunterLab for tomato colour classification analysis and for spectrophotometers that ensure the marketability and quality of their products. For more information on HunterLab and our commitment to colour measurement and evaluation in the ketchup industry, contact us today.