What causes this type of publishing problem?

Most publishing issues come from incorrect trim size, margin configuration, bleed setup, or PDF export problems.

How can I prevent these errors?

Run a print preflight validation and verify trim size, margins, spine width, and bleed before uploading your files.

Do publishing platforms automatically check these issues?

Yes. Platforms like Amazon KDP and IngramSpark use automated validation systems that reject files that do not match their specifications.

PrintValidation

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Image Resolution Problems

Low-resolution image and raster quality warnings.

Topic Introduction

The image-resolution cluster covers failures where raster assets do not meet print expectations. These issues are not just about nominal DPI values. They are about effective resolution after scaling, export compression, and final page placement.

A file may contain images marked 300 DPI and still fail if those same assets are enlarged in layout or rebuilt from low-quality web sources.

Why These Errors Happen

The usual causes are aggressive scaling in layout, web-derived artwork, export downsampling, and cover files built from reused graphics that were never intended for physical print size. Resolution problems often travel with color-profile and PDF export issues.

Because image degradation can happen at several stages, the root cause is frequently upstream of the final PDF.

Diagnostic Workflow

Identify the affected image, measure effective resolution at placed size, and verify whether export settings are reducing quality further. Cover and interior images should be checked separately because scaling behavior is different.

Only after confirming the asset quality should you continue to page-level validation or upload retries.