Bleed in book printing refers to the extra area beyond the trim edge of the page that ensures images, backgrounds, or design elements extend fully to the edge after trimming. This prevents unwanted white borders due to slight cutting variations.

Key Points:

• Bleed Size: Typically 3 mm on all sides, but it may vary based on the printer’s specifications.

• Trim Size: The final dimensions of the book after it is cut to its intended size.

• Why Bleed Matters: Printing and cutting are not always perfectly aligned, so the extra bleed ensures a clean, professional look without unintended white edges.

• Safe Zone: Keep important text and design elements at least 6 mm inside the trim edge to avoid being cut off.