When working with brand colours in print, understanding the differences in Pantone colours when coated vs uncoated paper is essential. Many businesses are surprised to discover that the same Pantone colour reference can appear noticeably different depending on the paper stock used.
Whether you are producing brochures, stationery, packaging or promotional materials, knowing how Pantone colour systems work can help you achieve more accurate and consistent print results.
The Pantone Matching System (PMS) is a standardised colour system used throughout the printing industry. Rather than relying on CMYK process colours alone, Pantone colours are created using specific ink formulations to achieve consistent results across different print runs and suppliers.
Each Pantone colour is assigned a unique reference number, making it easier for designers, printers and brands to communicate colour requirements accurately.
However, a common source of confusion is the lettering that appears after some Pantone colour references.
You may have noticed Pantone references such as:
Although the numerical colour reference is the same, the letter at the end indicates the type of paper stock the colour has been matched for.
The “C” stands for coated paper.
Coated papers have a smooth surface finish that prevents ink from being absorbed deeply into the paper fibres. As a result, colours often appear brighter, sharper and more vibrant.
The “U” stands for uncoated paper.
Uncoated papers are more porous and absorb more ink. This typically produces a softer appearance with colours appearing slightly duller or less saturated compared to their coated equivalents.
This distinction is one of the key reasons why differences in Pantone colours when coated vs uncoated materials are so noticeable.
Many people assume that Pantone 186 C and Pantone 186 U should look identical because they share the same colour number.
In reality, the Pantone number identifies the intended colour, while the paper stock influences how that colour is perceived once printed.
The biggest factor is how the paper absorbs ink.
On coated stock, ink sits closer to the surface, allowing more light to reflect from the colour. This creates a richer and more vivid appearance.
On uncoated stock, the ink penetrates further into the paper fibres, reducing colour intensity and producing a more muted finish.
Paper texture also affects colour appearance.
Smooth coated papers provide a cleaner surface for colour reproduction, while uncoated papers often have a natural texture that scatters light differently. This can alter how the colour appears to the eye.
Coated papers reflect more light than uncoated papers. Because colour perception depends heavily on reflected light, the same ink formulation can appear brighter on coated stock and softer on uncoated stock.
For businesses with established brand guidelines, understanding differences in Pantone colours when coated vs uncoated paper is particularly important.
A colour that looks perfect on a glossy brochure may appear noticeably different when printed on business cards, letterheads or packaging produced on an uncoated stock.
This does not necessarily mean the print is incorrect. It simply reflects the natural behaviour of ink and paper working together.
Many brand guidelines therefore specify both coated and uncoated Pantone references to help maintain visual consistency across different applications.
Colour accuracy begins long before a file reaches the printer.
Design files should be set up using the correct Pantone references from the outset. Selecting Pantone 300 C when the job will be printed on an uncoated stock may create unrealistic expectations during proofing and production.
It is also important to ensure:
Even small colour specification errors can lead to noticeable differences in the finished product.
Achieving accurate colour reproduction requires a combination of good design practices and clear communication throughout the print process.
Most professional design software includes separate Pantone libraries for coated and uncoated stocks. Always select the library that matches the intended paper type.
Digital screens can only provide an approximation of printed colours.
Physical Pantone swatch books remain one of the most reliable ways to evaluate colours and understand how they will appear on different paper stocks.
Where colour accuracy is critical, reviewing a proof before production can help identify any potential issues and provide reassurance that colours are behaving as expected on the chosen material.
Think about where and how the printed item will be used. A vibrant coated finish may suit marketing collateral, while an uncoated stock may better support a premium, natural or environmentally conscious brand image.
Understanding the differences in Pantone colours when coated vs uncoated paper can help businesses make more informed decisions about their printed materials. The same Pantone code may not look identical across different paper stocks, but by selecting the correct Pantone reference, preparing artwork carefully and reviewing proofs where appropriate, you can achieve more predictable and consistent results.
If you are preparing artwork for print and want to learn more about creating accurate files, take a look at Gemini Print Solutions’ Creative & Design service page: Creative & Design.
