Using AI to Generate Artwork for Print Books

Artificial intelligence (AI) has opened up exciting possibilities for book design. While we welcome book designs generated by AI, you must ensure that your designs are not only visually appealing, but are also in line with proper print specifications. 

Preparing AI-generated artwork for print requires careful attention to image resolution, page dimensions, bleed, margins, and file formatting. In this guide, we will explain how to generate AI artwork for print books and prepare your images for a successful printing process.

1. Plan Your Image Dimensions Before Generating Artwork

One of the most important steps in preparing AI artwork for print is determining the dimensions of the final printed image.

AI image generators often offer preset aspect ratios, such as square, portrait, or landscape. These ratios determine the overall shape of the image, but they do not necessarily correspond to the exact dimensions of your printed page.

For example, a 2:3 portrait image may be suitable for some book illustrations, but it will not automatically fit a 6 × 9-inch book page without cropping or adjustment.

Before generating images, determine:

• - Your book's finished trim size.
• - Whether the artwork will occupy a full page, part of a page, or a two-page spread.
• - Whether the image will extend to the edge of the page.
• - Whether important details need to remain away from the trim edges or binding.

If you know the intended layout in advance, you can write more effective AI prompts and reduce the amount of cropping or editing required later.

2. Understand Image Resolution: Why 300 PPI Matters

Resolution plays a major role in how sharp and detailed an image looks in print.

For most colour and grayscale photographs and illustrations, 300 PPI at the final placed size is a useful target. It generally provides good detail for typical book-printing applications.

For example, if you want to place an image across a 6 × 9-inch page, a target of approximately 1800 × 2700 pixels will provide 300 PPI when the image is placed at that size.

If the same image is only 900 × 1350 pixels, it will provide approximately 150 PPI at that size. The printed result may look softer or more pixelated, particularly in detailed artwork.

3. Make Sure You Include Bleed!

Bleed is the extra artwork that extends beyond the final trim edge of a printed page.

During production, printed sheets or pages are trimmed to their finished dimensions. Because trimming can vary slightly, artwork that ends exactly at the trim edge may leave a thin white line if the cut shifts. Bleed helps prevent this problem by allowing the artwork to extend beyond the intended cut.

AI image generators do not automatically create print-ready bleed. Instead, you should be sure to generate artwork that extends beyond the intended page boundaries.

How much bleed should you include?

We recommend adding 1/8″ (0.125″) bleed on all sides, or 1/4″ (0.25″) where required by the specific template or product.

For example, a 6 × 9-inch interior page with 0.125 inches of bleed on all four sides would require a document size of 6.25 × 9.25 inches.

Note: Bleed is required only on edges where the artwork extends to the edge of the finished page. Pages with a white border or artwork that stops inside the trim area may not require bleed.

4. Keep Important Details Inside the Safe Area

While bleed protects the outer edges of your artwork, the safe area protects important content from being trimmed or positioned too close to the page edge.

To help prevent text from being cut off during trimming, we recommend keeping text at least 3/8″ (0.375″) from the trim edge. 

Safe areas for text and illustrations

When generating artwork with AI, consider leaving open space for text and other design elements. You can include instructions in your prompt such as:

• "Keep the main character centered with generous space around the edges."

• "Leave clear negative space in the upper portion for a title."

• "Keep important objects away from the outer edges."
  

• "Avoid placing faces or essential details near the page boundaries."

Understand margins and the gutter

Margins are the spaces between the content and the edges of the page. They are especially important for books because the inner edge of each page sits near the binding.

The gutter is the area closest to the spine where a portion of the page may become harder to see or read once the book is bound.

A layout that looks balanced on a computer screen may feel cramped when printed, particularly in thicker books.

When preparing AI-generated artwork, consider the following:

• Inner margin: Allow additional space near the binding where needed.

• Two-page spreads: Avoid placing faces, text, or other critical details directly across the center fold.

The appropriate gutter and margins depend on the book's trim size, page count, paper, and binding method. A thin paperback and a thick hardcover may require different allowances.

5. Use AI Prompts That Are Designed for Print

A well-written prompt can help you generate artwork that is easier to incorporate into a book layout.

Instead of describing only the subject, include details about composition, orientation, background, and the space required for typography.

Example: Full-page children's book illustration

A prompt could read:

"Create a colourful, whimsical storybook illustration of a young fox walking through an enchanted forest at sunrise. Use a portrait composition suitable for a printed children's book. Keep the fox's face and important details well inside the outer edges. Extend the forest, foliage, and background naturally to all edges, leaving extra scenery that can be cropped during print trimming. Use consistent character proportions, rich but balanced colours, and detailed, clean illustration. Do not include text, lettering, borders, or watermarks."

Example: Full-page fantasy novel artwork

"Create a detailed fantasy illustration of an ancient stone castle surrounded by mountains and mist. Use a portrait composition with a cinematic atmosphere. Keep the main castle and important architectural details away from the outer trim edges. Extend the sky, mountains, and landscape beyond the intended frame so the image can be cropped for print bleed. Leave some uncluttered space in the upper third for optional typography. No text, logos, borders, or watermarks."

Example: Artwork for a two-page spread

"Create a wide landscape illustration of a peaceful coastal village at sunset for a two-page printed book spread. Compose the scene so the main visual elements remain away from the centre fold and outer trim edges. Allow the sea, sky, and distant landscape to continue naturally beyond all outer edges for cropping. Keep essential details away from the gutter. No text or borders."

6. Be Careful When Generating Text Inside Images

AI image generators have improved at producing text, but lettering can still contain misspellings, inconsistent characters, or distorted words.

For print books, it is generally better to generate the artwork without text and add the typography separately in a professional design or page-layout application.

This is particularly important for:

• Book titles and author names.

• Children's book dialogue and labels.

• Maps and diagrams.

• Captions and instructional illustrations.

• Chapter headings and page numbers.

Adding text separately gives you greater control over font choice, spacing, alignment, legibility, and spelling. It also makes it easier to revise the design without regenerating the entire image.

For cover artwork, keep in mind that the front cover, spine, and back cover must be designed as a complete cover layout. A front-cover image alone is NOT a complete print-ready cover file.

7. Choose the Right Colour Mode and File Format

Colour and file format also affect print preparation.

Many AI image generators produce RGB images, which are designed for digital displays, while printing workflows use CMYK.

RGB and CMYK represent colour differently, so some bright colours visible on a screen may appear less vibrant in print. The final result also depends on the paper stock, ink, and printing process.

AI Artwork Print-Preparation Checklist

Before submitting your book files, use this checklist to review your artwork.

• The artwork matches the intended orientation and composition.
• The image has sufficient pixel dimensions for its final printed size.
• Important details are positioned inside the safe area.
• Full-bleed artwork extends beyond the trim line.
• Bleed and document dimensions follow our print specifications.
• Margins and gutter allowances are appropriate for the binding.
• No important text or artwork crosses the center fold unintentionally.
• Text has been checked for spelling, alignment, and legibility.
• Colour settings and image formats meet the printer's requirements.
• The exported PDF has been checked for correct page size, bleed, and image quality

Professional Book Printing

AI can make it easier to develop original-looking illustrations and explore creative ideas for your next book. However, preparing those images for print takes more than generating a visually appealing picture. Proper resolution, bleed, margins, safe areas, and file preparation all contribute to a polished finished product.

Ready to print your book? Explore our book printing services and start planning your next project with Sure Print & Design.