

In the vast majority of cases, this appears only on screen! Sometimes it shows up on low-resolution printers, too, but virtually never in high-res commercial output. The result is that sometimes white peeks out between them.

But these opaque areas have to fit together like a mosaic, each piece right next to the next.

PDF version 1.3).įlattening transparency means “faking it” by creating opaque areas that look transparent. Have you ever opened a PDF file and seen thin white lines where there shouldn’t be any? In general, the white lines, or “light leaks” are due to a PDF that includes flattened transparency - transparency effects (such as placed PSD files) in a file saved in a file format that doesn’t support transparency (such as Acrobat 4, a.k.a.
