Superluminova consists of a ceramic powder (strontium aluminate), which is added to a rare earth element (europium) as an activator. The substance can be applied to the dial in many different shades and also has a range of emission colors. The luminous intensity and afterglow time depend on the concentration of the powder, the amount applied, and the chosen color. The lighter the color, the better the material glows.
The length of exposure to daylight is also a key factor in its activation, with a saturation point to meet. The luminous material charges faster in sunlight, while it takes a little longer indoors. And Superluminova has another quality: It can be reactivated countless times. Even after many years, a dial coated with Superluminova still glows just as well as it did on its first day.