If you’ve ever sent artwork to a printer and been asked to “include 3mm bleed”, you may have wondered what that actually means. The good news is that bleed is quite simple. Bleed is the extra area of your artwork that extends beyond the final trim size of your printed piece. It allows the background, images or colours to run right to the edge of the finished product without leaving an unwanted white or paper-coloured border. At Dynamic Print, we often get asked about bleed when customers are preparing artwork for business cards, stationery, wedding invitations, certificates, brochures and specialist print finishing such as hot foiling, embossing and die cutting. So, let’s explain it simply.
What is Bleed in Printing?
Imagine you’re printing an A5 invitation. The finished A5 size is:
148 × 210mm
If your design has a coloured background or photograph that runs all the way to the edge, you don’t want the artwork to stop exactly at the finished edge. Instead, you extend the background beyond the trim line. That extra area is the bleed. A simple way to remember it is: Trim size = the finished size of your printed item. Bleed = the extra artwork beyond the trim that will be cut away. This gives the printer a small amount of tolerance during the trimming process.
Why do you need Bleed on a PDF?
Printing and trimming are highly accurate processes, but there can still be very small variations when sheets are printed, handled and finished. If your artwork stops exactly at the trim edge, even a tiny movement during cutting could leave a narrow white or unprinted line around the edge. For example, imagine a business card with a solid black background. Without bleed, the black background finishes exactly at the cutting line. If the trimming moves slightly, you could see a tiny white edge. With bleed, the black background extends beyond the cutting line. The excess is trimmed away, leaving the finished card with a clean edge. Bleed is therefore a safety margin that helps ensure your finished print looks exactly as intended. How much bleed do you need? For many standard print jobs, 3mm bleed on all four sides is commonly used. However, bleed requirements can vary depending on the type of product, printing process and finishing involved. That’s why you should always check the printer’s artwork specifications before sending your PDF. At Dynamic Print, if you’re unsure about the amount of bleed required for your project, just ask us. We’d much rather help you get your artwork right before it goes into production.
What is a Safe Area?
As well as understanding bleed, it’s important to know about the safe area. The safe area is the space inside the finished trim where you should keep important information such as:
- Logos
- Text
- Contact details
- Important images
- Borders
- Other essential design elements
You don’t want important text sitting directly on the cutting line. Even with accurate finishing, small variations can occur during trimming, so keeping important content safely inside the trim helps ensure your finished piece looks balanced and professional. Think of your artwork as having three areas:
Bleed area – extra artwork that extends beyond the finished size.
Trim area – where the finished piece will be cut.
Safe area – where important text and design elements should remain.
How do you add Bleed to a PDF?
If you’re creating artwork in professional design software such as Adobe InDesign or Adobe Illustrator, you can normally set the bleed when creating your document. For many print jobs, this will be 3mm on each side. When you export your artwork as a print-ready PDF, make sure the bleed is included in the PDF export settings. For example, an A4 document is:
210 × 297mm
With 3mm bleed on each side, the artwork area becomes:
216 × 303mm
The finished product is still A4. The additional area simply provides the printer with the extra artwork needed for trimming.
What Happens if your PDF Doesn’t Have Bleed?
If your design doesn’t run to the edge of the finished product, you may not need bleed. For example, if you have a white background with plenty of space around your text, bleed may not be necessary.
However, if you have a:
- Full-colour background
- Photograph running to the edge
- Pattern
- Illustration
- Border
- Image or design element reaching the edge
then bleed will normally be required. If your PDF doesn’t contain enough bleed, your printer may need to ask you for revised artwork before production.
What About Bleed for Foiling, Embossing and Die Cutting?
At Dynamic Print, we produce much more than standard digital print. We specialise in hot foiling, embossing, blind embossing, die cutting and other specialist finishing techniques, so artwork preparation can sometimes require additional consideration. For example, if you’re producing a bespoke wedding invitation with a printed background, foil and a special die-cut shape, the relationship between the artwork, trim line and finishing becomes particularly important. If you’re unsure, talk to us before sending your artwork. We can advise you on the best way to prepare your file for the finished product you have in mind.
Our simple bleed checklist
Before sending your print-ready PDF, check:
- Is your document the correct finished size?
- Does your background or imagery extend into the bleed area?
- Is important text safely inside the trim area?
- Have you included the required bleed when exporting your PDF?
- Have you checked your printer’s artwork requirements?
Need help with your print-ready PDF?
We know that preparing artwork for print can sometimes be confusing, particularly when you’re combining printing with hot foil, embossing, die cutting or specialist papers. If you’re unsure about bleed, trim size, safe areas or preparing your PDF, contact Dynamic Print and we’ll be happy to advise you. Getting those few millimetres right at the beginning can make a big difference to the finished print.
