Three Layer Wet Paint System
Coating has always been the process that creates the greatest environmental burden during automobile production.
The volatile organic compounds (VOC) generated during a vehicle's coating procedures account for about 95 percent of total emissions for the entire production process.
Additionally, each coat requires its own baking and drying process and these are responsible for roughly 60 percent of all CO2 emissions.
Development of the unique Three Layer Wet Paint System
Various coating processes have recently been adopted by many automobile manufacturers around the world that reduce VOC emissions. The variety of these processes, however, actually leads to an increase in the CO2 emissions of between 5% and 60%.
In this current age, when the emphasis is on the urgent issue of minimising carbon emission, these methods are no longer appropriate.
In view of these concerns, Mazda has developed the unique Three Layer Wet Paint System, the first technology in the world to reduce VOC and CO2 emissions simultaneously.
Getting closer to solving all the problems of vehicle coating
As its name implies, the Three Layer Wet Paint System is a one-step baking and drying coating method that applies three layers in succession-primer coat, base coat and clear coat while still wet, without drying in between.
By eliminating the drying process previously required after applying the primer coat, CO2 emissions are reduced by 15%. In addition, a new low solvent content paint jointly developed with paint manufacturers and applied with high-precision coating equipment enables gains in coating efficiency, leading to reductions of 50% in VOC emissions.
Until recently, it was thought that using a wet paint system would lead to problems with paints mixing between the successive layers. For this reason traditional coating techniques require a drying stage following the intermediate coat. Mazda overcame this issue through innovations such as the newly developed interface control resin that was added to the paint. The Three Layer Wet Paint System also displays a deep tone finish that is unique to this method.