Need Consistent, High-Quality Print on Your Corrugated Packaging?
President Container Group uses GCMI standards and advanced color management to deliver accurate, repeatable color on every production run. Let us bring your brand graphics to life on corrugated.
What Is GCMI?
GCMI stands for General Converting and Marking Ink. In the corrugated packaging industry, GCMI refers to a standardized set of ink colors developed specifically for flexographic printing on corrugated board substrates — primarily kraft (brown) and mottled white linerboards. The GCMI color chart serves as a common reference that allows packaging buyers, designers, and manufacturers to communicate about ink colors using a shared, numbered system.
The GCMI system was created to address a fundamental challenge in corrugated printing: the substrate itself affects how ink colors appear. A blue ink printed on brown kraft liner looks dramatically different from the same blue ink printed on white coated stock. The GCMI chart accounts for this by showing how each standardized ink formula actually appears when printed on kraft and mottled white substrates, giving everyone involved in the packaging process realistic color expectations.
How the GCMI Color System Works
The GCMI color chart organizes inks into numbered color families. Each color has a designated number and is shown printed on both kraft and mottled white linerboard samples. This dual-substrate presentation is one of the most valuable aspects of the system, because it eliminates the guesswork that occurs when a designer specifies a color based on how it looks on white paper and then sees a very different result on a brown corrugated box.
Key features of the GCMI system include:
- Standardized formulations: Each GCMI color has a defined ink formula that any corrugated ink manufacturer can produce, ensuring consistency regardless of which ink supplier a box plant uses.
- Substrate-specific previews: Colors are displayed on kraft and mottled white backgrounds, reflecting real-world printing conditions on the two most common corrugated liner types.
- Industry-wide adoption: GCMI colors are recognized across the corrugated industry, making it easy to specify colors on purchase orders, structural drawings, and print specifications without ambiguity.
- Cost efficiency: Because GCMI inks are standard formulations produced in volume, they are generally less expensive than custom-mixed spot colors. Specifying GCMI colors when possible can reduce ink costs on a packaging project.
GCMI Colors vs. Pantone and Process Color
Brands frequently specify packaging colors using the Pantone Matching System (PMS), which is the dominant color standard in commercial printing and graphic design. However, Pantone colors are formulated for printing on white coated substrates and do not translate directly to corrugated board. This is where GCMI fills an important role.
When a brand specifies a Pantone color for their corrugated packaging, the ink supplier creates a formulation that matches the Pantone target as closely as possible when printed on the specified corrugated liner. The GCMI chart helps as a starting point — if a standard GCMI color is close enough to the desired Pantone shade, it can be used as-is, saving the cost of a custom ink match.
Process color printing (CMYK) is also used on corrugated, particularly for photographic images and complex graphics printed on F flute or EB flute boards with white liners. In process printing, four standard inks (cyan, magenta, yellow, and black) are combined in varying screen percentages to create a full spectrum of colors. GCMI spot colors and process colors are often used together — spot colors for critical brand elements like logos, and process colors for photographs and detailed illustrations.
How GCMI Affects Your Packaging Project
Understanding GCMI is practical knowledge that can save time and money on your corrugated packaging project. Here are the ways it directly impacts your decisions:
- Color selection: Choosing GCMI standard colors for your packaging graphics — especially for non-brand-critical elements like informational text, regulatory markings, and secondary graphics — reduces ink costs and simplifies production.
- Substrate choice: The same GCMI ink will appear brighter and more vivid on mottled white liner than on kraft. If color accuracy and vibrancy are priorities, specifying a white liner for the print side may be worth the incremental board cost.
- Print expectations: Ink coverage on corrugated is inherently different from offset printing on coated paper. GCMI charts help set realistic expectations for how colors will appear on your actual packaging substrate.
- Proofing: At President Container Group, we provide printed press proofs on the actual liner stock your job will run on, so you can see exactly how your GCMI or custom-matched colors will appear in the final product — not just on a digital monitor or inkjet proof.
Why Choose President Container for Corrugated Printing?
President Container Group operates advanced flexo folder gluer lines and standalone flexographic presses capable of producing high-quality multi-color printing using GCMI standard inks, custom Pantone matches, and full process color. Our pre-press team works with your brand guidelines to translate your color specifications into optimized flexographic print files.
Our printing services include careful ink management and press-side color monitoring to ensure consistency from the first sheet to the last. Whether you are producing simple two-color shipping cases or six-color retail packaging through our PIP division, our operators maintain the color accuracy your brand demands.
And because we are vertically integrated — corrugating, printing, converting, and fulfilling all under one roof — your project moves from design approval to finished packaging without the delays and quality risks of multi-vendor supply chains.
Frequently Asked Questions
Can I get an exact Pantone color match on corrugated board?
Custom ink formulations can get very close to Pantone targets, but the porous, textured surface of corrugated board and the color of the underlying liner mean that an exact match to a Pantone swatch printed on coated paper is not always achievable. PCG provides press proofs on your actual substrate so you can approve the color before production begins.
How many GCMI colors can be printed on one box?
The number of colors depends on the printing equipment. Our FFG lines support up to six colors in a single pass. For designs requiring more color stations or higher resolution, alternative printing methods or litho-laminated labels can be used. Most corrugated packaging projects use two to four GCMI or custom-matched colors.
Does using GCMI standard colors save money?
Yes. GCMI standard inks are produced in volume by ink manufacturers, making them less expensive than custom-matched formulations. They also require less setup time at press because operators are familiar with their behavior. When brand guidelines allow, specifying GCMI colors for secondary design elements is a practical way to reduce print costs.
Get Expert Color Management for Your Corrugated Packaging
President Container Group’s print team ensures your packaging colors are accurate, consistent, and optimized for corrugated substrates. Contact us to discuss your printing requirements.