Trapping
Trapping
| Trapping is the process of slightly enlarging the edge of one of two overlapping colour objects. In effect creating a minute area between the two objects in which there is a slight overprinting. This invisible effect offers the necessary tolerance required to compensate for the minor mis-registration experienced on press due to paper stretch or fan-out. |  |
Overprint
| Overprinting is the effect of double printing or printing over an area that already has been printed. Multiple colours/objects overprint each other. |  |
Knockout
| Knockout is the “opposite” effect of overprinting. In a knockout, overlapping objects do not print over each other. In this case there is no printing directly behind the object in the foreground. The term comes from the effect that the foreground object knocks-out the printing area of the object in the background. This would now create a case for trapping to be applied. |  |
Friesens applies trapping to all files supplied for printing including both PDF and application files. All application based trapping settings will be ignored. If you have specific requirements for trap, overprint or knockout settings, you should contact your CSR to make arrangements.