EU PPWR Cardboard Corner Protector Labeling Guide

A Guide to Cardboard Edge Protectors and PPWR Compliance in Exports to the European Union

Author: Arkas Packaging Technical Team

Category: Regulation & Compliance

Updated: 05/2026

The majority of companies exporting to the European Union tend to limit their PPWR compliance agenda solely to the export carton. While this approach is operationally understandable, it creates a serious regulatory gap. The cardboard edge protector, positioned inside or outside the shipping package, is defined as "packaging" under the EU's PPWR (Packaging and Packaging Waste Regulation). Therefore, it is subject to the exact same printing, marking, and traceability obligations as the export carton itself.

The fact that exporters have not fully grasped this reality sets the stage for surprise non-compliance findings during customs inspections. The inspecting officer has the authority to scrutinize the edge protector on the pallet using the same procedure applied to the PPWR prints on the export carton.

This guide has been prepared for companies exporting to the European Union or preparing to enter this market, as well as packaging procurement managers, to fully understand at a technical level the PPWR requirements applicable to solid board-based cardboard edge protectors.

What is PPWR and Why Does It Directly Affect Cardboard Edge Protectors?

PPWR is a new-generation regulation that replaces the EU's former Packaging Directive 94/62/EC. Unlike a directive, a regulation does not wait to be transposed into the national legislation of member states; it applies directly and uniformly in all member countries the moment it enters into force. For every exporter entering the EU market from Turkey, this means a uniform and mandatory compliance obligation.

The regulation aims to increase recycling rates, reduce packaging waste, and embed circular economy principles into every link of the supply chain.

Which Packaging Category Do Cardboard Edge Protectors Fall Into?

PPWR defines packaging according to functional categories:

Primary packaging: Packaging in direct contact with the product.

Secondary packaging: Grouping packaging that holds primary packages together.

Tertiary / Transport packaging: Any packaging component that protects products from damage during handling and storage.

In this classification, the cardboard edge protector falls under the tertiary packaging category. It is a packaging component that protects the corners and edges of the product stack on the pallet against impact, compression, and deformation; it is separated from the product once the transport process is complete to be subjected to recycling. The definition of "packaging" under Article 3 of the PPWR clearly covers this function.

Practical outcome: The moment the cardboard edge protector enters EU customs, it is subject to the same regulatory inspection as the export carton.

The Material Identity of Cardboard Edge Protectors: 21 PAP

The cardboard edge protector discussed in this guide is produced from a material known as solid board, or in industrial terminology, chipboard or recycled paperboard. In the standard coding system established by the European Commission for packaging materials, this material is identified by the code 21 PAP.

The vast majority of cardboard edge protectors on the market are solid board-based. Documenting this alignment between the edge protector's raw material structure and the print code with a material certificate is of critical importance for the exporter to meet the burden of proof during customs inspections.

PPWR Article 15 and Article 18: Core Compliance Framework

The two primary articles that directly regulate the printing and marking requirements on cardboard edge protectors are:

Article 15 — Packaging Information: All information and symbols on the edge protector must remain legible, indelible, and verifiable throughout the component's lifecycle—from production and transport to storage and the recycling facility. This information must be resistant to physical conditions such as humidity, pressure, friction, and temperature changes in logistics processes.

Article 18 — Traceability and Identification: The edge protector must bear a unique identification number that enables traceability and must include information identifying the manufacturer or importer. This article establishes an unbreakable link between the packaging component and the economic operator placing it on the market.

When both articles are evaluated together, the resulting picture is clear: The cardboard edge protector must be designed during the production process regarding the permanence and accuracy of the information it carries.

Physical Printing Rules: Material, Color, and Font

The physical standards for prints on cardboard edge protectors share the same parameters as the corrugated export carton:

The fundamental reason for these rules is practical: Black Arial print on a natural background provides maximum legibility for optical character recognition (OCR) systems in recycling facilities and manual barcode scanner readings. Different color or font combinations lead to scanning errors, thereby breaking the traceability chain.

PPWR Article 15 and 18 Compliance: Print Durability and Avoiding Labels

Articles 15 and 18 of the PPWR mandate that the information on the packaging component remains legible throughout its entire lifecycle. At this point, a critical technical decision emerges: Using adhesive labels is a highly risky method for meeting the durability requirements of the PPWR.

The usage conditions of cardboard edge protectors make this risk particularly evident. The edge protector is subjected to the following loads during the shipment process:

Pallet stretch film (stretch wrap) pressure: The friction between the film and the edge protector pushes, curls, or peels off adhesive labels.

Container and warehouse humidity: The moisture cycle in maritime transport lifts the label from underneath, destroying legibility.

Static stacking load: The pressure from the upper layers of the pallet can mechanically deform the label surface.

Cold chain conditions: In condensation environments, the adhesive properties on the label deteriorate, and the label surface blisters.

During a customs inspection, any of these damages directly translates into a non-compliance report on the grounds of an "illegible marking."

Arkas Packaging's Technical Approach:

Instead of a label, direct printing is applied to the solid board surface of the edge protector using high-strength water-based black ink.

Prints are tested using industrial protocols such as ASTM D5264 (Sutherland rub test) and ISO 18947 (abrasion resistance).

The legibility of the print throughout all logistics processes is verified and documented through humidity chamber tests (95% humidity, 48 hours at 40°C), static load tests, and drop tests (ISTA 1A).

For each batch of cardboard edge protectors, these tests are conducted in Arkas Packaging's own laboratory or at accredited external facilities, and a certificate of conformity is issued to the exporting company.

Why Direct Print Instead of Labels?

The surface structure and absorbency characteristics of solid board make label usage physically problematic. Furthermore, the PPWR's principle of avoiding unnecessary chemicals adopts direct printing as the fundamental approach.

Basic Rules and Why Labels Are Excluded

Color — Black Only: Colored labels or labels with pigmented inks disrupt the de-inking process during recycling. By using water-based black ink, Arkas Packaging ensures 100% recovery of the paper pulp.

Font — Arial or Sans-serif: Even if the correct font is used on the label, the font requirement is considered violated if the label detaches from the solid board surface. In direct printing, the font is an inseparable part of the material.

Adhesive Contamination: Acrylic or hot-melt adhesives used in labels cause contamination in the recycling pool. PPWR Annex II (Recyclability Criteria) restricts such adhesives.

Arkas Packaging's Testing and Approval Processes

Rub Test: Using a Sutherland rub tester with 2 kg pressure, print loss must be ≤ 5% after 10 double strokes.

Scotch Tape Test (ASTM D3359-Method B): The print's adhesion resistance to the surface must be at a 4B or 5B level.

Damp Rub Test: There must be no bleeding or smearing of the print in condensation environments.

UV Fading Test (ISO 12040): Color change ΔE ≤ 1.5 after 24 hours under a Xenon lamp.

Application Note: In flexo or digital printing technologies, ink penetration and density must meet standard requirements following humidity and compression tests. This falls under the technical responsibility of the packaging manufacturer.

Outer (Side) Surface Printing Requirements

The outward-facing surface of the edge protector is the primary area where logistics and regulatory identity are carried. Under the PPWR, it is mandatory to have the following elements fully present on this surface:

1. Exporter / Manufacturer Company Identification Details

The company's full commercial address (at the street, city, and country level).

Website address and/or other digital communication channels.

(This information is mandatory so that EU customs authorities and market surveillance bodies can quickly identify the economic operator placing the product on the market.)

2. ISO 7000 Series Symbols

EU legislation mandates the use of international graphical symbols to identify the entity placing the packaging component on the market:

ISO 7000-3082 Symbol: Used by the company that actually manufactures the edge protector (Manufacturer).

ISO 7000-3725 Symbol: Used by the company that introduces the edge protector to the EU market but does not manufacture it itself (Importer).

Every exporter must use only one of these two symbols, depending on their role in the supply chain. Using both together or selecting the wrong symbol constitutes direct grounds for non-compliance.

3. Unique Packaging ID

It is mandatory for the edge protectors belonging to each production batch to bear a system-registered unique Packaging ID. This identification number links the edge protector to the production batch, material certificate, and traceability record.

Production Date: Stating the week number and year format (e.g., W22/2025) is optional; however, it provides strong practical convenience in terms of supply chain management and recall procedures.

Inner Surface (Recycling) Printing Requirements

The inner surface of the cardboard edge protector that comes into contact with the product or pallet surface is the mandatory area reserved for recycling information. All symbols on this surface must be visible and legible from the outside, not when the edge protector is mounted on the product, but after the edge protector is separated from the product—that is, when it enters the waste management process.

Although this placement rule seems like a technical detail, it serves a critical function for the correct operation of automated sorting systems in recycling facilities. The elements mandatory on the inner surface are listed below:

1. Recycling Logo

The standard recycling pictogram indicating that the packaging component is a recyclable material must be located in this area.

2. RESY Symbol and RESY Identification Number

RESY is the trademarked symbol of the recycling and take-back system operated for transport packaging in Europe. The system has become mandatory in many EU member states, especially Germany.

The RESY logo must be visually present on the inner surface of the edge protector.

In addition, the RESY member/identification number belonging to the packaging manufacturer that produced the edge protector must be included in text format.

This number proves that the packaging manufacturer is registered with the RESY system; it relieves the exporting company from the responsibility of independently verifying whether the manufacturer has fulfilled the system registration obligation. Arkas Packaging's RESY identification number is printed as standard on the inner surface of every batch of edge protectors produced.

3. "21 PAP" Material Identification Code

In the standard coding system determined by the European Commission for packaging materials, the solid board-based cardboard edge protector is defined by the code 21 PAP.

Both the numeric code (21) and the abbreviation (PAP) must be written together on the inner surface.

This code is mandatory so that recycling facilities can automatically direct the material to the correct stream.

4. Triman Logo

Triman is a symbol system originating in France that has now become the standard for packaging recycling information in multiple EU member states. The use of the Triman logo is mandatory for all transport packaging components, including cardboard edge protectors.

Triman warns the consumer and the waste management operator that the packaging component is recyclable. It is the visual component of the circular economy infrastructure aimed at reducing emissions caused by incorrect waste sorting.

Customs and Market Risks of Non-Compliance

The customs and market surveillance authorities of EU Member States have implemented systematic inspections covering packaging components as of 2024. The practical risks encountered due to non-compliance originating from cardboard edge protectors are as follows:

Shipment Detention: Edge protectors bearing incomplete or illegible print information constitute sufficient grounds alone for the entire shipment to be detained at customs.

Product Return: The detection of an incorrect symbol, missing code, or illegible marking can lead to the entire batch being returned to the exporter.

Administrative Fines: Placing products on the market with non-compliant packaging components is directly subject to sanctions under member state legislation.

Brand Reputation Damage: Large-scale buyers, particularly in Germany, France, and the Netherlands, are now including packaging components within the standard scope of supplier qualification audits.

Cardboard Edge Protector PPWR Compliance with Arkas Packaging: Technical Supply Solutions

Arkas Packaging, one of Turkey's established industrial packaging manufacturers, has created a comprehensive compliance framework encompassing cardboard edge protector production with the entry into force of the PPWR.

Technical standards offered by Arkas Packaging in the cardboard edge protector production process:

PPWR Article 15 and 18 Compliant Print Design: All information areas are technically verified prior to production according to the permanence, legibility, and placement standards envisioned by the regulation.

21 PAP Material Code Application: The code suitable for the solid board raw material structure is applied as a standard on the production line; it is matched with the material certificate for every batch.

ISO 7000 Series Symbol Integration: The correct symbol is included in the print template according to the customer's role in the supply chain.

RESY Membership Infrastructure: Arkas Packaging's RESY identification number is printed as standard on the inner surface of every batch produced, securing the exporting company in terms of system compliance.

21 PAP, Triman, and Recycling Logo Printing: Applied on the production line in accordance with inner surface placement rules.

Packaging ID Allocation: A unique identification number is generated for each production batch and matched with the exporter's document set.

Durability Test Protocol: Print permanence is documented for each batch through the Sutherland rub test, Scotch tape test, humidity chamber test, and UV fading test, and a certificate of conformity is issued.

The integration of these steps into the production process by the packaging supplier significantly reduces the manual checking burden on exporters before each shipment and systematically eliminates the risk of non-compliance.

Summary: Cardboard Edge Protector PPWR Compliance Checklist

The following table is the core audit list that every exporter and packaging procurement manager can use during the production approval process:

Frequently Asked Questions (FAQ)

1. Are PPWR printing obligations for cardboard edge protectors valid across the entire EU market, or do they only apply to those exporting to specific countries?

PPWR is an EU regulation; it is directly based on EU law, not on the national legislation of any member state. Therefore, it applies equally to exports made to Germany, France, Italy, Poland, or all other 27 member state markets. Exporting to a specific country does not provide an exemption from the legislation of other member states; the edge protector falls under the scope of the regulation the moment it enters the EU customs union.

2. What should we do if our current stock of edge protectors does not have PPWR-compliant printing?

While it is theoretically possible to partially comply edge protectors currently in stock that do not meet PPWR requirements by adding labels, these additions must meet the "legibility throughout the entire lifecycle" standard mandated by PPWR Article 15. Retroactively applied adhesive labels will highly likely fail to meet this standard under stretch film pressure, humidity, and mechanical load conditions. The safest route is not to use the non-compliant stock for export purposes and to replace it with a new batch procured from PPWR-compliant production.

3. Should the exporter obtain the RESY number, or is this the responsibility of the packaging manufacturer?

The RESY identification number is a systemic registration number belonging to the company that manufactures the packaging component. Therefore, obtaining and printing this number is directly the responsibility of the packaging manufacturer. What the exporting company needs to do is to verify whether the packaging manufacturer they supply from is registered with the RESY system and to confirm in the supplier contract that this number is applied as standard to the inner surface on the production line.