The Moiré effect, or in other words a halftone screen overlay, is a common phenomenon when viewing prints. It occurs when two even patterns overlap unevenly.
When does Moiré appear?
Moire is always created when screens overlap. Typical examples:
- You have scanned in a newspaper ad and print it in another newspaper.
- You print the portrait of a managing director wearing a jacket with a fine houndstooth pattern, a checkered shirt and a finely patterned tie. Regardless of the printing process, complete moiré chaos is guaranteed to break out here.
- A brick building is reproduced in offset printing.
- The photograph of a ventilation grille is viewed on a monitor