Monday, July 23, 2018, 5:22

Bleeds

Bleeds mean areas located at the very edge, that go beyond the line of cutting. This area usual is about 2 mm long, and is necessary, so the process of trimming (cutting out) wont leave white margins on the edge.

Like in any other type of professional equipment, the cutters and trimmers have decreasing in time accuracy, usually specified by the producer. This is due to thickness of the blade (which does not equal zero). Therefore, the area of the printed paper which will be trimmed is usually slightly wider then line drawn on the image.

Another cause of this inaccuracy is the lack of precision of printing presses. The position of the trimming line is usually given as its distance from the edge of the sheet. If, in the process of printing said distance would slightly change, the knife may or may not (and usually will not) hit precisely the place it should.

What then? If the is no bleed on the image, and the knife have trimmed on the area beyond the margins, there will be a thick white line, which will contrast with colored image in a unsightly manner.

It’s always good to keep in mind those additional two millimeters on each side of your image. It should be noted, that 2 mm bleeds are not a part of given image, but the elements that will stick out beyond the area of use. That means we wont get a proper bleed by just up scaling the whole image. In modern graphic software, option to add proper bleeds is usually automatic, just remember about selecting the appropriate option while exporting a file.