What is high profile, midtones and shadow?

The bright part of the screen reflects a large amount of light and has a low density. If it is a halftone, the part with a dot size of 10% to 30% is usually called a high-profile part. The colored part on the screen has less reflected light and a higher density. If it is a halftone, the part with a dot size of 70%-90% is usually called a dark part. The portion of the screen centered on the degree of lightness and darkness, the amount of reflected light is between high-profile and dark-tone, and if it is a halftone, the portion with a dot size of 40% to 60% is usually called a midtone.