Bleed is a printing term that refers to printing that goes beyond the edge of the sheet before trimming. In other words, the bleed is the area to be trimmed off. The bleed is the part on the side of a document that gives the printer a small amount of space to account for movement of the paper, and design inconsistencies. Artwork and background colors can extend into the bleed area. After trimming, the bleed ensures that no unprinted edges occur in the final trimmed document.
It is very difficult to print exactly to the edge of a sheet of paper/card so, to achieve this, it is necessary to print a slightly larger area than is needed and then trim the paper/card down to the required finished size. Images, background images and fills which are intended to extend to the edge of the page must be extended beyond the trim line to give a bleed.
Bleeds in the US generally are 1/8 of an inch from where the cut is to be made. Bleeds in the UK and Europe generally are 2 to 5mm from where the cut is to be made. This can vary from one print company to another. Some printers ask for specific sizes; most of these companies place the specific demands on their website or offer templates that are already set to their required bleed settings. (from Wiki)
1. Trim is where the product will be cut.
2. Bleed is the zone outside the trim area.
3. Margin is the zone inside the trim area.
Bleed | Brochure | Flyer | Folding | Perforating | Trimming |