Exposure of photosensitive stamp machine 1-2 times. Ask the merchant when you buy it, or you can look at the usage of the photosensitive seal machine. As the latest seal in the world, photosensitive seal engraving machine (commonly known as photosensitive seal engraving machine, portrait seal engraving machine and wedding seal engraving machine) is rapidly popularized in China, and has become an upgraded product of China seal industry because of its simple and quick production, clear seal, long service life and strong applicability. With the promulgation and implementation of the standard GA 24 1.9-2000 of the Ministry of Public Security, the photosensitive seal machine has been recognized as the first choice for reaching the standard.