Recently, I was in the market for a new car. I scoured reviews, watched safety testing videos, and compared fuel efficiency to finally arrive at the perfect vehicle. I was sure this was the one for me and headed to online forums to try to get a sense of maintenance costs. What I found there stopped my automotive plans in their tracks: numerous owners reported that the paint color of one of the panels didn’t match the rest of the car. The problem was widespread and I could not be assured that the car I ordered wouldn’t have the same issue, so it was back to the drawing board.
Accurate Measurement in Challenging Conditions
Cars are manufactured using hundreds of components of various materials and textures that must fit together into a cohesive, aesthetically pleasing whole. Of particular importance is the exterior body paint of the car; the smallest variation in color consistency can be a glaring error that impacts the appeal of the vehicle and drives consumers in another direction. Maintaining high color quality control standards is not only important for an individual car, but between cars to ensure that consumers receive what they expect base on brochure and model car representations. Precise color measurement is paramount to the manufacturing of new cars in order to maintain repeatable, accurate pigmentation of all components.
The paints used in the production of today’s automobiles present special challenges to color monitoring and require sophisticated instruments to ensure accurate measurement. Integrating advanced spectrophotometric technologies in car production lines can ensure bumper to bumper color consistency and allow for accurate measurements, even when working with difficult materials. Metallic and pearlescent paint formulations that contain flakes of mica and aluminum to create different color perceptions based on the viewing angle are especially vulnerable to misreadings.1 In order to compensate for the shifting nature and high reflectivity of metallic paints, multi-angle spectrophotometers are used to measure color at multiple angles and produce reliable readings based on comprehensive spectral information. Spectrophotometric instruments can also be calibrated to ensure accurate measurement of non-metallic high-gloss paints with significant levels of spectral reflectance. By monitoring the color of each component and ensuring all the individual parts adhere to the set standard, auto manufacturers can create visually harmonious vehicles that satisfy consumer demands.
Expanding the Possibilities for Used Cars
While spectrophotometers are critical to the manufacturing of new cars, they can also play an important role in the maintenance and modification of used cars. Over time, the elements alter the appearance of automotive paints; even paint jobs that look perfectly good to owners often have slight variations from their original state due to the effect of sun exposure, pollution, and salt. If an exterior panel needs to be replaced following a collision, for example, putting a panel with the original color next to the worn color of the rest of the car can make the difference obvious. As such, auto body technicians use spectrophotometers to analyze the current color of the car to create an exact paint match that can be used for the replacement part, ensuring that the repaired vehicle has a cohesive appearance.2 However, you are not limited to recreating the existing color of a car. Through advanced color matching, auto body shops can create custom paints that allow customers to personalize their vehicles for a completely new look or to restore the car to its original glory with historically accurate colors.
Choosing the Right Tools
HunterLab’s comprehensive range of spectrophotometric instruments offers innovative end-to-end solutions to meet the specialized needs of the automotive industry. From dedicated on-line color monitoring in new car manufacturing to benchtop and portable spectrophotometers for body shops offering collision repair, customization, and restoration services, we have the tools to bring color measurement to new heights and optimize quality control. Contact us to learn more about HunterLab’s complete array of instrumentation, user-friendly software, and outstanding support services.
- “Metallic paint appearance measurement and rendering,” March 24, 2014, http://www.researchgate.net/publication/261026853_Metallic_paint_appearance_measurement_and_rendering ↩
- “Spectrophotometers Measure Color to Help You Stay in the Black,” January 1, 1998, http://www.searchautoparts.com/abrn/technicians/paint-shop/spectrophotometers-measure-color-help-you-stay-black ↩
Mr. Philips has spent the last 30 years in product development and management, technical sales, marketing, and business development in several industries. Today, he is the global market development manager for HunterLab, focused on understanding customer needs, providing appropriate solutions and education, and helping to solve customer color challenges across these industries and cultures.
In the case of color matching with effect pigments ISOCOLOR has used a combination of tools: spectral reflectance given by HunterLab sphere spectrophotometers like the UltraScan VIS connected to ISOMATCH formulation software and digital image given by a microscope. This type of set-up has proven to be more successful for color formulation of angle-dependent materials then multi-angle devices giving only directional information without integrating the color and appearance factors altogether. In refinish paint ISOMATCH uses a specific module to search standard colors from an existing library, re-match with new batch of paint or make a color adjustment including metallic pigments.