When working with Pantone colors, you will often see a letter suffix attached to the color number, such as "C" or "U" (e.g., Pantone 186 C vs. Pantone 186 U). While the color number is identical, the suffix denotes a major physical difference in print outcomes. In this article, we explain the difference between Coated and Uncoated colors.

1. Coated (C) Colors

The "C" suffix stands for Coated paper. Coated paper has a smooth, glossy, or matte finish applied to its surface (like glossy magazine covers or brochures). Because the paper surface is sealed, the printed ink rests on top of the coating rather than sinking into the paper fibers.

This results in colors that look vibrant, crisp, and high-contrast. If you want bright, saturated reds, blues, or yellows, printing on coated paper with Coated Pantone references is the way to go.

2. Uncoated (U) Colors

The "U" suffix stands for Uncoated paper. Uncoated paper is porous and has a textured feel, similar to standard printer paper, letterheads, or textured envelopes. When ink is printed on uncoated paper, the ink absorbs directly into the paper fibers.

Because the ink sinks into the page, colors will spread slightly and appear softer, warmer, and less vibrant. For example, Pantone 186 C (a bright crimson red) will look like a softer, slightly darker, more muted red when printed as Pantone 186 U on uncoated stock.

Why Do They Have the Same Ink Code?

It is a common misconception that Coated and Uncoated Pantones use different ink formulas. In reality, the ink mix formula is exactly the same! The difference in the Pantone swatch book is simply a visual representation of how that *same ink* will look when applied to different paper stocks.

This is why graphic design software like Adobe Illustrator or Photoshop includes separate books for Coated and Uncoated, allowing designers to preview the final printed outcome on screen.

Which One Should You Choose?

  • Choose Coated (C) references if your final product will be printed on glossy paper, plastic packaging, coated boxes, or merchandise.
  • Choose Uncoated (U) references if your product is a corporate letterhead, business card on cardstock, canvas bag, or newsprint.