PCR Content Labeling: 3 Real Boundaries for Printing—Blown-Film Supplier Claims, Brand Claims, and Third-Party Certification: The First Question to Ask When a Printer Receives a Recycled-Resin Order

A personal care customer approached us to print 500ml HDPE bottles for shower gel. The requirements were clear: use recycled resin with 30% PCR and print a “30% recycled plastic” label on the bottle.

Many customers consider this a simple task. Before printing, we asked one question: “Is this 30% the feedstock input ratio reported by the blown-film supplier, or the content verified by third-party certification?”

The customer replied that it had been confirmed with the blown-film supplier, as if to say, “What could be wrong with that?”

The problem is significant.

The First Boundary: The Supplier’s 30% and the Package’s Actual 30% May Be Different Figures

The actual PCR addition ratio during blown-film processing and the final PCR content of the finished bottle are not the same thing.

The difference mainly comes from three sources: first, losses during compounding—when PET bottle flakes and PE regrind are mixed and pelletized, some impurities and moisture are removed; second, the possibility that the bottle neck and cap are produced separately—the HDPE bottle body and cap may come from two batches, with no PCR used in the cap and 50% used in the body, reducing the actual content of the complete bottle; and third, multilayer coextrusion—virgin resin may be used for the barrier layer, with PCR added only to the main layer. The measured recycled-content ratio is generally lower than the nominal addition ratio.

We later visited the blown-film supplier. Its equipment had a PCR 30% silo label, but two virgin-resin silos were positioned next to it. The process used three-layer coextrusion, with virgin resin in the barrier layer. Although the supplier’s PET bottle-flake regrind input was 30%, third-party testing found that the actual recycled content of the finished bottle was 24.6%.

This is the difference between 30% and 24.6%. If the customer does not know this, the result is effectively an overstated figure printed on the bottle.

The Second Boundary: The Legal Basis for PCR Content Labels Versus Self-Declared Claims

PCR labeling can be divided into three levels, but the distinctions are often unclear.

Level 1: Formal environmental product certification—such as China Environmental Labelling, or PCR content certifications issued by industry organizations. These involve third-party testing, a validity period, and company registration. They use prescribed graphical marks and cannot be reproduced simply as printer-added text.

Level 2: Mandatory packaging label requirements—including the Requirements for Restriction of Excessive Packaging and relevant Chinese national and industry standards for recycled plastics. These specify formats and placement for recycled-content declarations, including numerical values, symbols, and requirements concerning the position of the “recycled content percentage.”

Level 3: Self-declaration by the brand owner—for example, a brand states “made with 30% recycled material” on its website, product page, or promotional material. Packaging-label regulations may not directly govern this claim, but the Advertising Law and the Anti-Unfair Competition Law do. Without a substantiated basis for the figure, it may constitute false advertising.

At our printing company, we mainly handle Levels 1 and 2. Level 3 is beyond our control, but Level 2 has prescribed label forms. A printer cannot simply design “PCR” inside a circle and print it on the bottle. Many packaging designs combine a circular-arrow symbol with “PCR,” which is non-compliant.

The Third Boundary: Who Signs Off on the Figure?

This is the core issue we most want to explain.

For packaging claiming 30% PCR, four parties are involved in the chain and the figure:

The blown-film supplier states that it input 30% and is responsible for the feedstock ratio; the third-party testing organization issues a report based on measured values and is responsible for the test method; the brand owner prints the claim on the package and is responsible for its content; and the printer is responsible for reproducing the customer-supplied claim accurately in the designated position, but is not responsible for the accuracy of the figure itself.

In practice, however, when a problem arises, the printer is often the party held most accountable. The usual reasoning sounds reasonable: “You were the final step. Why didn’t you check it?”

Our internal procedure is: when accepting an order, the printer requires the customer to provide written documentation identifying the source of the PCR figure and the responsible party, then stores the document with the order. The format can be a simple one-page statement reading: “The recycled-resin content of this product is X%. The source is the feedstock ratio reported by [blown-film supplier] / third-party test report No. [number].”

We do not test the resin at the customer’s blown-film supplier. We do not have the qualifications to do so. But we require the customer to identify the source of the figure and confirm that source. These are the steps we can reasonably take.

Some people consider this unnecessary. Consider a real case: a shower gel customer used 30% PCR bottles in 2022 but changed blown-film suppliers in 2024 without changing the label. The new supplier’s feedstock ratio was 20%. The customer’s product is still on sale, with 30% printed on the bottle.

This is not the printer’s fault. However, if the printer had stored the original documentation, traceability would have been much clearer.

3 Common Errors We Encounter

Error 1: Confusing virgin-resin content with recycled-resin content. A blown-film supplier’s production record may state “30% virgin material added for modification.” Here, 30% refers to a virgin modifier added to ensure mechanical performance; it does not mean PCR. The label must be checked to determine which type of material the figure refers to.

Error 2: Incorrect label placement. Recycled-content labeling has prescribed presentation requirements on packages. A common requirement is placement immediately adjacent to the material identification and not obscured by other labels. Placing it in small text below the main visual on the front panel is generally non-compliant.

Error 3: Imprecise wording. “Contains recycled content,” “30% recycled content,” and “30% recycled resin” have different legal meanings under different standards. When a customer says, “Just write 30%,” the printer must ask for the exact wording.

Further Reading

Recycled-resin labeling is related to regulations, testing, and sampling processes. These articles provide useful context:

• Compliance Requirements for 4 Types of Plastic Packaging Materials—basic labeling requirements for different plastic types.
• Implementation Gaps Across 4 Types of Packaging Recycling Label Standards—specific differences among GB/T 18455 / ISO 14021 / ASTM D5488 / EN 17130.
• Actual Impurity Rates for 3 Types of Recycled Paper—recycled-material issues on the paper-based side are separate from plastic PCR.
• Practical Use of 4 Types of Prohibited Advertising Terms in Packaging—figures used in self-declarations are also subject to advertising law.