---
title: Stop Treating Coatings as Optional: The 3 Checkpoints in Packaging Specs
lang: en
source: https://mindsprt.dev/en/knowledge/coatings-essential-modern-packaging/
---

# Stop Treating Coatings as Optional: The 3 Checkpoints in Packaging Specs

*File Preparation · 6 min read · 2026-09-24*

> Coatings have shifted from a finishing add-on on carton surfaces to a spec item that determines ink adhesion, moisture resistance, abrasion resistance, tactile quality, and recyclability compatibility; designers can learn from the pressroom why brands now write coatings into their spec sheets, and what to ask before file handoff

**Quick answer:** Brands write packaging coatings into spec sheets because they simultaneously govern ink adhesion, abrasion resistance, moisture resistance, tactile quality, and recyclability compatibility; Mai Strategy's three print-handoff checkpoints start by putting functional requirements, application method, and recycling conditions in writing

## Why Are Brands Starting to Write Coatings into Their Spec Sheets?

Because substrates have changed, and packaging now has to withstand more, coatings directly affect printing, finishing, logistics, and recycling. Flint Group Packaging Solutions (the packaging solutions division of Flint Group), in their September 9, 2026 article [Why Coatings Are Becoming Essential in Modern Packaging](http://www.flintgrp.com/news-and-events/news/why-coatings-are-becoming-essential-in-modern-packaging/), opens with a question that comes up constantly on the floor: "Can you print on this substrate?" The answer almost always comes down to coatings and primers. The name of the paper or film alone won't tell you.

Packaging coatings are functional materials applied to substrates like paper and film to improve ink adhesion, moisture barrier, abrasion resistance, and appearance, and they affect downstream finishing and recyclability. Mai Strategy's three print-handoff checkpoints build these conditions into the spec sheet, so brands don't just write "I want matte" or "I want scratch resistance" without specifying which stage needs protecting.

I've seen beautifully designed files come in one line short on specs, and the sample goes two completely different directions.

## How Do Coatings Handle Adhesion, Barrier, and Durability?

Coatings work through different functional layers, each addressing the printing risks that come with new substrates. Primer adjusts surface tension first, that's the surface condition determining how well ink grips the substrate. Barrier coating handles migration (material components moving into the product contents), reducing dependence on complex multi-layer structures. Functional chemistry adds slip, heat resistance, and abrasion resistance.

As films get thinner and mono-material constructions replace multi-layer laminates, printing and downstream finishing become more sensitive to surface conditions. That's why Mai Strategy's three print-handoff checkpoints list coatings as a separate line item.

・Primer: keeps ink adhesion and color density more consistent across different surfaces

・Barrier coating: handles barrier requirements, reducing dependence on complex multi-layer structures

・Functional chemistry: handles slip, heat resistance, and abrasion resistance, letting lightweight materials survive downstream processing

## How Do Designers Turn Coatings into an Actionable Spec?

Designers need to break coatings into four columns, substrate, function, application method, and acceptance criteria, not just leave "matte" or "scratch-resistant" as the only descriptors. Mai Strategy's three print-handoff checkpoints can go directly into a quote request or sample order.

Look at the substrate first. Not the effect.

・1. Substrate checkpoint: specify paper, film, or recycled paper; add surface finish, absorbency, and gloss differences

・2. Function checkpoint: specify primer, barrier coating, or decorative coating, and explain what it needs to handle, folding, packaging, friction, moisture, or display effect

・3. Recycling checkpoint: ask the printer to confirm that the coating, substrate, and recycling target are compatible; don't leave "recyclable" as a marketing line

When reviewing samples, don't just look at the front face and colors, check fold lines, friction marks, moisture contact, and how things look after stacking, because packaging may face automated packing, distribution, and weeks of storage and handling. Application method should also go in the spec; otherwise the same "matte" can end up as two completely different surface effects.

## Why Does Surface Quality Need to Be Tested Alongside Logistics Tolerance?

Because how a package looks when it arrives depends on both shelf presentation and supply-chain friction. The coating has to protect the print first, before you can talk about soft-touch matte, high-gloss, or tactile effects.

The scenarios Flint Group lists are grounded: picking lines, automated packing systems, and storage and distribution that can stretch for weeks. E-commerce packaging doubles as a shipping container and a brand touchpoint, if the surface picks up scuffs or dulling through folding, packing, and handling, the visual the designer delivered takes a hit.

Recycled paper and film differ in surface finish, absorbency, and gloss; coatings help maintain visual consistency across substrates. I ask designers to run the same color artwork on candidate substrates as physical samples, don't judge the final look from screen gloss.

Get the physical sample first.

## How Should Small and Mid-Size Printers in Taiwan Handle These Specs?

Small and mid-size printers in Taiwan need to move coatings from the tail end of a quote to a pre-quote conversation, confirm the substrate, print conditions, application method, function, and recyclability first, then price. Brands ultimately calculate total cost across materials, processing, sampling, and rework; you can't just watch the per-process fee.

The brand's quote request should have at least four columns.

・Substrate, paper, film, or recycled paper; what are the differences in surface absorbency and gloss

・Coating, for adhesion, barrier, slip, heat resistance, abrasion resistance, or decorative effect

・What contact will the finished piece face through folding, packing lines, distribution, and weeks of storage

・Is the recycling target compatible with the coating, and what do you check in samples and acceptance inspection

For mid-to-high-end fully custom packaging, hand the candidate substrates, coating purposes, and acceptance criteria to MINDS to work through the spec together. For mid-to-low price points needing standardized online orders, run a round of visual and spec validation with MINDS first.

## Key Takeaways

・Coatings belong in the spec sheet because they govern ink adhesion, finished-product durability, and recyclability compatibility at the same time

・Primer, barrier coating, and functional chemistry each solve different problems, don't try to cover every need with just "matte"

・Before file handoff, designers should put substrate, function, application method, and acceptance criteria on a single spec

・E-commerce packaging has to pass shelf viewing, packing lines, distribution, and weeks of storage and handling

## Further Thoughts

On the print manufacturing side, building fixed columns for substrate, coating, finishing, and acceptance into standard processes is a good place to start. On the design side, putting coating conditions into the spec and sampling workflow means bleed and color settings don't have to carry all the risk alone. AI is useful for spec-gap checks and version comparisons, flagging missing substrate, function, or recycling conditions, but it can't replace physical sampling, folding, and friction verification. SaaS teams serving brand procurement or print collaboration should build these columns into required, trackable review workflows, so quote documents preserve material decisions instead of just showing a unit price.

## Further Reading

・[Why Coatings Are Becoming Essential in Modern Packaging](http://www.flintgrp.com/news-and-events/news/why-coatings-are-becoming-essential-in-modern-packaging/)

## FAQ

### Why can't brands just write 'matte' in the spec sheet?

Matte only describes appearance, it doesn't say which problem needs solving: adhesion, abrasion resistance, moisture resistance, barrier, or recyclability. A packaging spec needs at minimum the substrate, coating function, application method, and acceptance criteria.

### What's the difference between primer and barrier coating?

Primer mainly improves ink adhesion and color density on the substrate. Barrier coating mainly handles barrier performance and migration. They serve different purposes and can't be substituted for each other under the same finishing name.

### What coating conditions should designers check before file handoff?

Check the paper or film's surface finish, absorbency, and gloss; confirm the coating purpose and recycling requirements; then run physical samples on actual candidate substrates to check fold lines, friction, moisture contact, and stacked appearance.

### How can small printers avoid finding out too late that a coating doesn't work?

Confirm substrate, function, application method, logistics contact, and recyclability compatibility before quoting, so the printer can verify at the sampling stage, not after the finished product has a problem and rework is needed.


---

> HTML version: https://mindsprt.dev/en/knowledge/coatings-essential-modern-packaging/
> MINDS — 麥思印刷整合有限公司 · https://mindsprt.dev