Let’s take a simple example (no need to worry, things will get
complicated later, see
The devil in the overprint and knockout detail). Suppose you have a PDF file with two
overlapping objects. Their fill colors are as follows:
| Ink |
Background object |
Foreground object |
| Cyan |
40 % |
0 % |
| Magenta |
0 % |
0 % |
| Yellow |
0 % |
60 % |
| Black |
0 % |
0 % |
The table below shows what will “normally” happen when this PDF file
is color-separated and printed.
| |
Knockout |
Overprint |
| Preview |
|
|
| Cyan plate |
|
|
| Yellow plate |
|
|
| Resulting color in the
intersection |
C: 0 %
M: 0 %
Y: 60 %
K: 0 %
|
C: 40 %
M: 0 %
Y: 60 %
K: 0 %
|
