Understanding the Most Effective Methods for Color and Gloss Measurement of Paint


Posted on June 30, 2016

Regardless of my more conservative taste in color, I am still surprised how difficult choosing the right hues can be. Simply grabbing a color sample card off the shelf and throwing some paint up on the walls does not always guarantee the outcome you desire. Quality results rely on both color and gloss measurement of paint to ensure that what you see is what you get. These basic color measurement guidelines start at the beginning of paint development and production to ensure that final product results are consistent, accurate, and made to last.

How Gloss and Color Work Together

Accurate color measurement of paint depends on the measurement of both gloss and hue for quality results. Many paint products are available in both high gloss and matte finishes to appeal to a variety of consumer tastes. However, these subtle changes can make a huge difference in color matching results and final color outcomes.

To the human eye, these differences can vary depending on viewing angle, surface area, and light source. Therefore, trying to obtain manual color matching accuracy is nearly impossible. Instrumental analysis allows you to regulate both the viewing angle and the light source in a controlled sample setting in order to optimize color results and ensure consistent color matching capabilities.

Color is represented by light reflectance, so as light bounces off an object, the human eye decodes that information at a certain level of color concentration based on how much of that light is reflected. High gloss paints and coatings exhibit the greatest levels of specular reflection, making the color appear more saturated, whereas matte finishes demonstrate a diffused reflection pattern, making the color appear lighter. Spectrophotometers measure the color variations between gloss and matte using the standard law of reflection, which allows for accurate measurement results regardless of surface orientation.1 By controlling and monitoring these variables throughout production, paint and coating manufacturers can effortlessly meet American Society for Testing and Materials (ASTM)2 standardization guidelines and develop quality products with ease.

Gloss Measurement for Quality Control

Gloss measurement in paints and coatings is not only valuable when it comes to color matching and appearance; these measurements can also serve as an indicator for final surface quality. Early detection of high gloss levels in paints and coatings often signifies problems at later stages of manufacturing. Chipping and flaking often correlate with abnormally high gloss measurements, signifying poorly cured paints and coatings.

Color retention, fading, and peeling are all common concerns for both residential and commercial paints and coatings. Because consumers are looking for reassurance in their paint and coating products, they are willing to pay premium prices to avoid costly errors. Monitoring both color and gloss throughout the early stages of production can help avoid these errors that may later lead to loos of quality of product recall.

Understanding Color and Gloss Measurement Tools

Gloss levels are categorized by visual evaluation, so the geometric principles required to measure these differences vary according to each individual attribute. Specular gloss, sheen, contrast, luster, and haze all factor into these equations, so understanding what instrumentation setting is needed is an important step in effective color and gloss measurement. Advanced spectrophotometric technology allows for both color and gloss to be measured simultaneously, increasing the user ability and efficiency of this tool.

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