File Setup for Full Bleed Printing
Before any project gets printed, it must be formatted into a print-ready file. Understanding bleed, same zones, and borders is an essential step to printing your project and a must-know for any creator.
In most types of projects, printing goes all the way to the edge of a page. Pick up virtually any book from a shelf and in most cases you’ll see that the artwork extends all the way to the very edge. To ensure there are no blank areas at the edge of your page, an extra 0.125 inches of artwork is required beyond the trim line to accommodate for what is known as “bleed.”
Full Bleed Printing
The bleed area (depicted in red below) will be cut off in the final product, but printing it helps to ensure that your design will fully extend to the end of the page. This is because there is a standard cutting variance of up to 1mm inherent in professional printing processes. By incorporating an extra 0.125” of artwork into your design, you’ll create a buffer to accommodate for this variance.
Likewise, it’s also a good idea to keep any critical text or important graphics at least 0.125” away from the edge of the page and in what is referred to as the “safe zone,” depicted in white below. The areas depicted in gray are not within the safe zone, and therefore could be at risk of getting cut off in the trimming process. This is because the 1mm variance applies to either direction, inwards or outwards.
Here’s what you need to know:
Everything within this red space will be trimmed off. However, you should still extend your design to the edge of this area. This will prevent the very edge of your project from having an irregular white border as a result of the variance in the trimming process.
This dotted line is the edge of your page. We will trim your book to size along this line, but you’ll have to extend your design 0.125 past this line to account for a cutting margin of error. Additionally, because the trim variance could extend up to 1mm inwards as well, it’s a good idea to leave any critical components of your design out of this area.
Anything within these lines is safe, so keep all of your important text and visual content within this white box.
PrintNinja uses sheet-fed, offset printers. This means several pages of your book will be printed on the same sheet of paper. Then, a large machine will trim each paper down to size. Bleed allows for the tiny variances inherent in mechanical printing to ensure your design will run all the way to the edge of each page.
Adding Bleed to Your File
We have outlined steps here in our resources to help you set up files with bleed room using the program of your choice, including Adobe InDesign, Photoshop, and Illustrator.
An Important Note About Borders: Due to the variance of up to 1mm in cutting, we recommend that any borders you would like to include on the perimeter of your page extend a full 0.25 inches inside of the trim line, which is twice as far as the safe zone. This way, your borders will appear even, regardless of the standard cutting variance.
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