What is the number of screens

The number of screen lines is the number of Internet sites per unit length, usually expressed as how many lines per line or as many lines per line. The center distance between every two dots is equal to the reciprocal of the dot lines. For offset printing, the higher the number of lines and the same percentage of outlets, the smaller the number of outlets, the finer the level of performance, and the stronger the ability to express levels, but the more serious the network expansion during the printing process; the lower the number of lines, the lower the number of outlets. If the percentage is the same, the larger the network, the worse the performance of the subtle level, but the network expansion during the printing process is lighter.