Why Journals Keep Rejecting Your Figures (And How to Fix 300 DPI, CMYK & Vector Specs)

You spent months in the lab and weeks writing your manuscript. Getting a revision notice purely because your figures failed the journal’s automated preflight check is exhausting.

1. Vector vs. Raster: The Core Mistake

Plots, bar charts, and schematics should always be vector (EPS, PDF, SVG). Raster formats (TIFF, PNG, JPEG) are for micrographs and photographs. When you export a line graph as a low-res JPEG, lines blur when reviewers zoom in.

2. The Column Width Math

Journals print in strict 1-column (85–90mm) or 2-column (170–180mm) widths. If you design a figure on a massive canvas and scale it down in Word, the text labels become illegible.

3. Resolution & Colour Space

• Photographs / Micrographs: Minimum 300 DPI in RGB (for online) or CMYK (for print).
• Line Art / Combinations: 600 to 1200 DPI.
• Labels: Consistent sans-serif font (Arial or Helvetica) between 6pt and 10pt at final print size.

The Golden Rule

Formatting means meeting publication specs — never altering the raw data. Clean labels, proper DPI, and exact dimensions save you weeks of production delays.