Products with automatic light-emitting function: the light absorption, the dark luminous, including the rescue of ships and ship safety signs, fire control two major categories of identification products for emergency evacuation of the ship channel instructions, staircases logo, signs line the corridor, the wall logo ground labeling, the deck of the direction of life-saving equipment, logo, logos, such as fire-fighting equipment, such as guiding people in the fire happens to hold a timely manner or to flee to safety region. Such safety signs in a variety of visible light absorption of 10-15 minutes can be realized in the dark automatically Department luminescence, light emitting time of up to 10-12 hours.