Metamerism is a term that is not part of the dictionary of the Royal Spanish Academy (RAE). The concept refers to phenomenon what is generated when two color swatches appear identical under certain circumstances and then under other conditions they are different.

MetamerismThe vision angle and the lighting source they are among the factors that can cause metamerism. Many times this phenomenon is a complication when acquiring a painting, for example: people buy a certain shade based on how they perceive it in the sample and then, by applying the painting at home, they notice that it is different.

The call illuminance metamerism it is the most frequent. Occurs when samples are matched under a class of light, but if they are visualized with other lighting, the color that is reflected is no longer the same.

The geometric metamerism, meanwhile, depends on the angle of view. In this way, if the samples are seen from a particular point, they coincide, although from another position not anymore. Another phenomenon of this group is the field metamerism, associated with the changes that occur with distance.

With the objective To avoid metamerism, companies that manufacture assembled or piece-based products use various processes and mechanisms, so that the result is homogeneous. The use of glossmeters, spectrophotometers, colorimeters and visual assessment booths, in this framework, it is frequent. It should be noted that metamerism can also be a problem for visual artists due to the characteristics of the materials and the supports used.