Why We Blend PIR and PCR in Recycled Paper Packaging

by Casey Mazza April 22, 2025

PIR and PCR recycled paper packaging is not a one-size-fits-all material choice, and at EcoPackables we blend both types on purpose in every production run. Our paper-based packaging, from Kraft mailers to honeycomb-padded mailers, retail boxes, paper tubes, and shipping cartons, is made using a deliberate mix of post-consumer recycled (PCR) and post-industrial recycled (PIR) content.

Sustainable packaging should not be a compromise. It needs to hold up in transit, print cleanly, and scale with your order volume, all while keeping recycled content as close to 100% as possible. Blending PIR and PCR is how we get there.

So what is actually the difference between these two recycled fiber sources, and why does the ratio matter? Here is how we think about it, and what it means for the packaging you ship every day.

Key Takeaways

PCR (post-consumer recycled) paper comes from used material like shipping boxes, magazines, and paper bags that have been collected, sorted, and reprocessed.
PIR (post-industrial recycled) paper comes from clean manufacturing scrap, such as trim and excess stock, that never reached a consumer.
Blending PIR and PCR gives EcoPackables mailers, boxes, and paper tubes longer, more consistent fibers alongside genuine post-consumer recycled content.
PIR fibers are typically cleaner and more uniform, supporting smoother surfaces and better print quality on Kraft mailers and retail boxes.
PCR supply depends on local recycling infrastructure and consumer participation, so PIR helps stabilize supply and avoid production delays.
Processing PCR costs more due to sorting and de-inking; blending in PIR helps keep 100% recycled packaging cost-competitive.
EcoPackables applies this PIR/PCR blend across its Recycled Kraft Mailers, honeycomb padded mailer, and recycled paper tube lines to balance strength, appearance, and cost.

PCR vs. PIR at a glance.

Factor	Post-Consumer Recycled (PCR)	Post-Industrial Recycled (PIR)
Source	Used consumer materials: boxes, bags, magazines	Clean manufacturing scrap and trim
Fiber length and consistency	Shorter, more variable after multiple recycling cycles	Longer, more uniform
Surface and printability	Can be less uniform	Cleaner, smoother, better printability
Supply stability	Tied to local recycling and collection rates	More abundant and predictable at the mill level
Processing cost	Higher, due to sorting and de-inking	Lower, since the scrap starts out clean
Circularity role	Diverts waste from landfill after consumer use	Prevents manufacturing scrap from being wasted

What's the Difference Between PCR and PIR Paper?

Post-Consumer Recycled (PCR) Paper

Post-consumer recycled paper is made from material that has already served its purpose, think used newspapers, magazines, paper bags, or shipping boxes collected through curbside and commercial recycling programs. After being sorted, cleaned, and reprocessed, these fibers get a second life in new packaging. PCR content is what most people picture when they hear "recycled," and it is the material stream that directly reduces landfill and consumer waste.

Post-Industrial Recycled (PIR) Paper

Post-industrial recycled content comes from clean scrap generated during manufacturing, such as paper trim from large-scale converting operations or excess material from printing lines. This is material that was never used by a consumer but would otherwise go to waste. Because it never entered the mixed waste stream, PIR fiber tends to be cleaner and more uniform going into the next production run.

Both PCR and PIR are recycled content, but they play different roles in performance and supply chain stability, which is why the ratio between them matters as much as the recycled label itself.

Why We Blend PIR and PCR Recycled Paper Packaging

Using both PIR and PCR in recycled paper packaging is not just common, it is essential for a supply chain that has to hold up at scale. Here is why we do it.

1. Improved Performance and Durability

Packaging has to hold up under pressure, literally. From shipping boxes to honeycomb-padded mailers, strength matters. PCR fibers can be shorter and less uniform after multiple recycling cycles, while PIR offers longer, more consistent fibers. By combining the two, we create packaging that is not only sustainable, but structurally sound and suitable for e-commerce, retail, and logistics.

2. Reliable Quality and Appearance

PIR is typically cleaner and more uniform, which helps ensure smoother surfaces and better printability, important for branded retail boxes and Kraft mailers where visual appeal counts. Blending in PCR supports genuine circularity, while PIR helps keep quality consistent run after run.

3. Stronger Supply Chain Resilience

PCR supply is tied to consumer recycling rates and local infrastructure, which can vary by region and season. PIR, however, is more abundant and predictable, especially at the mill level. Blending both ensures we can scale your packaging without bottlenecks or delays.

4. Cost Efficiency Without Cutting Corners

PCR can be more expensive to process due to sorting and de-inking. PIR, being cleaner to start with, helps offset those costs, making recycled packaging more affordable while still meeting your sustainability goals.

Where the Cost Savings Come From

Recycled fiber is not priced the same across the board. Sorting, cleaning, and de-inking add real cost to PCR, while PIR arrives at the mill already clean. Blending the two is what lets us keep 100% recycled packaging price-competitive instead of passing sorting costs straight through to your invoice.

Where You'll Find PIR and PCR Blends in EcoPackables Products

Whether you are shipping a product in a 100% recycled Kraft mailer, protecting goods with our honeycomb paper padded mailers, boxing up a product in a recycled cardboard shipping box, or using recycled paper tubes for compact storage, we apply the same thoughtful PIR/PCR sourcing behind the scenes.

If you ship in plastic film instead, our recycled poly mailers follow the same logic in a different material: GRS 4.0-certified film blending post-consumer and pre-consumer recycled content in place of virgin plastic.

Our goal is 100% recycled content wherever possible, combining PIR and PCR to balance sustainability with performance, cost, and appearance. Browse our full sustainable mailers collection to see the blend in action across formats.

The Bottom Line: Smart Sourcing for Real Sustainability

Recycled content is not one-size-fits-all, and neither is sustainability. By blending PIR and PCR, EcoPackables ensures your paper packaging does not just check a box, it actually works the way you need it to: tough when it counts, consistent in appearance, and built on a circular foundation.

Have questions about the recycled content in your current packaging? Our team can walk you through the material blend and help you choose the best option for your goals through our contact page.

Frequently Asked Questions

What is the difference between PCR and PIR paper?

Post-consumer recycled (PCR) paper is made from material that already served its purpose, such as used shipping boxes, magazines, and paper bags collected through recycling programs, then sorted, cleaned, and reprocessed into new fiber. Post-industrial recycled (PIR) paper comes from clean manufacturing scrap, like trim from converting operations or excess stock from printing lines, that never reached a consumer. Both are recycled content, but PCR removes material from the waste stream after use while PIR prevents manufacturing waste in the first place.

Why does EcoPackables blend PCR and PIR content in its recycled paper packaging?

EcoPackables blends PCR and PIR because each material contributes something the other cannot. PIR's longer, more uniform fibers add strength and printability to products like our Recycled Kraft Mailers, while PCR content keeps the circularity story genuine by reusing post-consumer waste. Combining them also stabilizes supply, since PIR is more predictable than PCR, which depends on local recycling infrastructure, and helps control processing costs.

Is PIR recycled content as sustainable as PCR content?

PIR and PCR both keep material out of landfills, but they address different parts of the waste stream. PCR content diverts paper that consumers have already used and discarded, which is why many sustainability standards and buyers weight it more heavily. PIR content prevents clean manufacturing scrap from being wasted before it ever reaches a customer. EcoPackables blends both because a packaging supply built on PCR alone is less predictable, while a supply built on PIR alone would not capture true post-consumer circularity.

Does blending PCR and PIR make recycled paper packaging weaker?

No. Blending typically makes recycled paper packaging stronger, not weaker. PCR fibers can become shorter and less uniform after multiple recycling cycles, but blending in longer, more consistent PIR fibers restores structural strength. This is why EcoPackables' honeycomb paper padded mailers and Kraft mailers hold up under e-commerce shipping conditions while still using recycled content.

Why is PCR paper more expensive to process than PIR paper?

PCR paper costs more to process because collected consumer material has to be sorted by type, cleaned, and de-inked before it can be reformed into usable fiber. PIR scrap is already clean, since it comes directly from manufacturing and converting operations rather than a mixed waste stream, so it requires less processing. Blending PIR into recycled packaging helps offset PCR's higher processing costs while keeping overall recycled content high.

Are EcoPackables mailers and boxes made from 100% recycled content?

Yes. EcoPackables targets 100% recycled content across its packaging. Paper-based products, including Recycled Kraft Mailers, honeycomb padded mailers, retail boxes, and paper tubes, combine PCR and PIR fiber sources. Recycled Poly Mailers use a parallel approach in film form: GRS 4.0-certified recycled plastic blending post-consumer and pre-consumer content instead of virgin plastic.

Are Paper Packaging Options Like Cardboard Boxes Compostable? A closer look at how recycled paper materials break down at end of life. How Much Does Packaging Cost in 2026? Prices by material type, order size, and format across common packaging formats. Kraft vs Poly Mailers: Which One Is Right for Your Brand? Comparing recycled Kraft paper and recycled poly mailers for e-commerce shipping.