Color difference control technology is recognized as one of the more difficult techniques to master, and it is also an important part of product quality control. First of all, there should be a suitable production environment including experienced manpower, advanced machinery and equipment, temperature and humidity (climate) of the site, operation reaction time (raw material chemical reaction), followed by strict color matching process and standards and reliable performance of the toner and other raw materials. Some of these operational elements are controllable and some are uncontrollable, such as the climate environment. If it can be controlled by manpower but not well controlled, it is easy to cause color difference. 

In addition, each toner factory use different color ratio which generate different chemical action on different acrylic sheets, it is often said that the base of color is different, naturally the effect of colored acrylic mirrors is different, especially the different batches of acrylic mirrors more or less will appear relatively small color difference, this is inevitable.