Common styles of index pins include flat index pins, three-dimensional index pins, embossed index pins, etc., each with its unique processing method and technological requirements. Additionally, the materials of index pins vary, including metals, plastics, ceramics, etc., requiring different processes and equipment during processing depending on the material.


Stamping: The metal index pins of luxury watches often adopt the stamping process, which ensures standardized and three-dimensional fonts without any surrounding depressions. During stamping, the high density and hardness of the metal index pins maintain the clarity and integrity of the fonts.


Laser Engraving: Laser engraving is another common processing method that uses high-temperature laser beams to burn the surface, forming standard fonts from dots to lines. The bottom groove of laser-engraved fonts appears whitish, which is a trace left by the laser burning.


Milling: Machine milling of index pins ensures standardized fonts with uniform force. In contrast, hand milling focuses more on artistry and personalization, with varying degrees of force in the fonts and a noticeable sense of starting and stopping strokes.


Etching: Etching is a special processing method that coats the non-etched parts with a protective wax and then uses an etching solution to corrode out the font part. The bottom groove of etched fonts appears dark, with slight concavity and convexity along the edges.