Halftone
The technique of reproducing an image with small dots of varying sizes, spacing, and colors is referred to as halftone. Modern printing techniques utilize halftone principles to reproduce images. A simple example of a halftone technique can be seen in the image below. On the left side of the imag ... Read More

Halo Effect

A faint shadow or glow can sometimes occur around an image called a halo, the halo effect, or halation. This effect can occur at several levels of a printed image. The halo effect is undesirable because it is not controlled and modifies the desired image to varying degrees. At the smallest le ... Read More

Hot Spot

A printing defect called a hot spot can occur during the plate making process in which an air bubble or dirt cause part of the plate to prevent a complete formation – called drawdown – which results in poor or no ink coverage in that portion of the image. Because the four color printing process ... Read More