Tempered blue hands

Tempered blue hands (also called blued hands) are a type of hands found in some wrist watches. The term “tempered blue” refers to a heat-treatment process that is applied to the hands to produce a blue color. The process involves heating the hands to a high temperature and then cooling them rapidly, which creates a surface layer with a blue color that is more resistant to corrosion and wear. Tempered blue hands are often used in high-end or luxury watches, where they are prized for their beauty and durability. The blue color of the hands provides a distinctive look that sets the watch apart from other models, and can help to enhance the overall design and aesthetic appeal of the watch.