File Setup Guide for
Book Printing

Overview

Proper file preparation is crucial for achieving professional print quality. This guide covers all technical requirements for book printing at Rainbow Book Printing.

Document Size & Bleed

Understanding Bleed

Bleed is the area beyond your final trim size where images and backgrounds should extend. This ensures no white edges appear after trimming.

Size Limitations

Safe Zone

Keep all critical text and elements at least 0.25 inches (6mm) away from the trim edge to prevent accidental trimming.

Color Mode & Profiles

CMYK vs RGB

All files must be converted to CMYK color mode before submission. RGB colors will appear different when printed.

Recommended Color Profiles

• US/Americas: SWOP (Coated) or GRACoL
• Europe: ISO Coated v2 (ECI)
• Asia: Japan Color 2001 Coated

Black & White Printing

For B/W interior pages, use Grayscale mode or 100% Black (K) only. Avoid rich blacks with CMYK combinations for text.

Image Resolution

Minimum Requirements

Fonts & Text

Font Embedding

All fonts must be embedded in your PDF. Missing fonts will cause text to reflow or display incorrectly.

Font Requirements

• Use TrueType (.ttf) or OpenType (.otf) fonts
• Embed all fonts with full character sets
• Avoid bitmap or screen fonts
• Check font licensing for commercial printing

Minimum Font Sizes

Accepted File Formats

Preferred Formats

1. PDF/X-1a:2001 - Industry standard, best compatibility
2. PDF/X-4:2008 - Supports transparency and layers
3. High-Quality Print PDF - With all fonts embedded

Also Accepted

• Adobe InDesign (.indd) - with packaged fonts and links
• Adobe Illustrator (.ai) - with outlined fonts or embedded
• TIFF (.tif) - for single-page layouts only

Cover File Specifications

Cover Layout

Hardcover and softcover books require a single-piece cover file that includes:

• Back cover (left)
• Spine (center)
• Front cover (right)
• Inside flaps (if applicable)

Spine Width Calculation

Spine width depends on page count and paper weight:

Cover Specifications

Interior File Specifications

Page Setup

• Create as single pages (not spreads)
• Include all pages in sequence
• Total page count must be divisible by 2
• Add blank pages if needed for proper count

Interior Specifications

Export Settings

Adobe InDesign Export Settings

1. File → Export → Adobe PDF (Print)
2. Select PDF/X-1a:2001 or PDF/X-4:2008 preset
3. Set compatibility to Acrobat 5.0 (PDF 1.4) or higher
4. Check "All" under Pages
5. Under Marks and Bleeds: Set bleed to 0.125"
6. Under Output: Color Conversion = Convert to CMYK
7. Under Advanced: Subset fonts at 100%

Adobe Illustrator Export Settings

1. File → Save As → Adobe PDF
2. Select PDF/X-1a:2001 preset
3. Under Marks and Bleeds: Set bleed to 0.125"
4. Ensure all fonts are embedded or outlined
5. Convert all colors to CMYK

Pre-Flight Checklist

Before submitting your files, verify the following:

✓ Document Setup

• Correct final trim size + 0.125" bleed on all sides
• All elements extend into bleed areas
• Safe zone margins maintained (0.25" minimum)
• Page count is correct and divisible by 2

✓ Color & Images

• All images are CMYK (or Grayscale for B/W)
• All images are 300 DPI minimum at final size
• No RGB or spot colors present (unless specified)
• All linked images are included

✓ Fonts & Text

• All fonts embedded in PDF
• No missing or substituted fonts
• Minimum font sizes met
• Black text is 100% K only (not rich black)

✓ File Export

• Exported as PDF/X-1a or PDF/X-4
• File opens correctly in Adobe Reader/Acrobat
• No security restrictions or passwords
• File size is reasonable (compress if over 100MB)