There's a standard out there that, in my opinion, doesn't get nearly the attention it deserves. ISO 20616 was developed to solve one of the most persistent problems in the print supply chain: the lack of a structured, data-driven way for brands and print buyers to communicate color expectations to their print suppliers — and for those suppliers to report back with measured results.
It's not a new concept. Anyone who has worked in brand color management knows the frustration. A brand sends a job to a printer with a PDF, some PMS numbers, maybe a legacy ICC profile, and a note that says "match the approved sample." The printer does their best. The brand rep holds up the printed piece under fluorescent light and says it's wrong. The printer says it matched the proof. Nobody has the same data. Nobody is speaking the same language.
ISO 20616 was written to fix that. The problem is, almost nobody is using it.
What Is ISO 20616?
ISO 20616 is a two-part standard that gives brands and their print suppliers a shared, structured language for color — one that both software and people can read. Think of it as a handshake with two halves: the brand states its requirements on the way in, and the printer reports its results on the way back out. Nothing critical gets lost in a phone call, an email thread, or a marked-up PDF.
Part 1 is the brand's half. It produces a file called PRX — Print Requirements eXchange — that captures everything the printer needs to know about what "correct" means for this job: the colors that matter, their exact target values, how much variation is acceptable, and which ones are make-or-break. The point isn't any single field; it's that the whole specification travels as structured data instead of living in someone's inbox or memory.
Part 2 is the printer's answer. Once the job runs, the supplier generates a PQX file — Print Quality eXchange — carrying the color actually measured on press, how far each color landed from its target, and a plain verdict: in conformance, or not.
When that file comes back alongside the printed piece, the brand isn't taking anyone's word for it or trusting a glance under a lamp. The data shows exactly where the job landed, and both sides are looking at the same answer.
| PRX (ISO 20616-1) | PQX (ISO 20616-2) | |
|---|---|---|
| Direction | Brand → printer | Printer → brand |
| Says | "Here's what correct looks like" | "Here's what we actually produced" |
| Carries | Target colors, tolerances, priorities | Measured values, distance from target, pass/fail |
Why This Matters
Color disputes between brands and printers are almost always rooted in a communication failure, not a capability failure. Most PSPs are technically capable of hitting a target — the problem is that the target was never clearly defined in a format that's objective and actionable.
PRX solves the upstream problem. PQX solves the downstream one. Together, they create an auditable, traceable record of both the color agreement and the color outcome.
In packaging especially — where color is a brand asset that directly affects shelf impact — having a structured exchange like this is not a nice-to-have. It's the professional baseline.
The Gap Nobody Talks About
Here's the honest reality: ISO 20616 does an excellent job of defining the theory of color exchange. What it doesn't do is give you the platform to actually do it.
The standard doesn't come with software. There's no app, no dashboard, no workflow integration included. You get the specification, and then you have to figure out how to implement it in your actual production environment.
This is why adoption has been so slow. The people who need this most — brand managers, procurement teams, smaller print suppliers — don't have the technical infrastructure to build PRX/PQX exchange workflows from scratch. And without a platform, the standard stays a document on a shelf.
Where Alder Color Control Comes In
This is where I get to share something I'm genuinely excited about.
Our platform, Alder Color Control, is purpose-built for exactly this kind of structured color management. Within it, there's a module called Project Inspector that is, as far as I know, the best available implementation of ISO 20616 in a production-ready platform.
Project Inspector allows brands and PSPs to set up shared color projects where:
- Color requirements are defined in structured, measurable terms — exactly what ISO 20616-1 describes
- PSPs measure and submit actual production data back into the platform
- Pass/fail conformance is evaluated against the defined tolerances automatically
- Both the brand and the PSP have visibility into the same data, in real time
It's not just theory. It's a working exchange system. The brand defines what they need (PRX intent). The PSP reports what they delivered (PQX result). The platform handles the comparison, the reporting, and the audit trail.
For brands that are printing across multiple suppliers, or PSPs that want to demonstrate to clients that their color is conformant and documented, this is the infrastructure that makes ISO 20616 actually work in practice — not just on paper.
Who Should Be Paying Attention
If you're a brand or packaging manager who currently communicates color requirements through PDFs, physical samples, or verbal approvals, ISO 20616 is the standard that formalizes what you've been trying to do manually. It gives you a structured format your suppliers can receive, interpret, and respond to with data.
If you're a Print Service Provider, this is also your opportunity. PSPs that can receive a PRX file, produce to that spec, and return a PQX file with conformance data are offering something the industry desperately needs and rarely gets. That's a competitive differentiator.
The brands that understand color management — the ones in packaging, retail, and consumer goods — are moving toward measurable, data-based workflows, and the PSPs that can support that shift will be the ones that retain those clients.
Getting Started
If you want to explore how ISO 20616 fits into your workflow, or you want to see how Alder Color Control's Project Inspector works in practice, reach out to us at dang@aldertech.com or visit aldertech.com/color-management-support.
The standard exists. The platform exists. The only thing missing is more people using both.