Once the pieces were inside and the chambers turned on, their powerful pumps created vacuum pressure and tinted the pieces through a molecular process. involves layering a series of thin films on a surface — and the color perceived by the viewer is determined by the number of layers. is always transparent; it contains no pigment or paint,” said Lucien Steinmann, co-chief executive of Positive Coating, which was founded in 2004 and specializes in surface treatments using A.L.D. process was invented in 1974, and has been used by the semiconductor industry to prepare microchips since the 1990s. Positive Coating introduced an adapted version of the technique to the watch world in 2014 when it began offering what it called “decorative A.L.D.” Since then, other competitors have emerged.

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Persons: ”, Lucien Steinmann, Steinmann, “ Locations: ”