In today’s fast-paced and increasingly security-conscious world, safeguarding your products and sensitive information is more critical than ever. Whether you operate in the pharmaceutical, food and beverage, logistics, or any other industry, maintaining the integrity of your products is essential. Tamper-evident labels provide a simple yet effective solution to ensure your products remain secure, traceable, and trusted throughout their journey. This guide will explore tamper-evident labels, how they work, and why they are indispensable for your business. To learn more about the types of void labels we offer, click here.
Types of Tamper Evident Labels
Labels are designed to show clear signs of interference when someone attempts to open or alter them. They are widely used across various industries to protect against theft, contamination, and tampering.
These labels provide physical evidence and a deterrent to those attempting unauthorised access by leaving a visible indicator when manipulated. The primary types of labels are:
Barrier Seal Labels
Barrier seal labels are designed for applications requiring the highest level of tamper evidence. These labels use advanced materials and adhesives that create a secure barrier when applied. When tampered with, the seal is visibly distorted or destroyed, making it impossible to reseal without detection. Often used in logistics, pharmaceuticals, and confidential document handling, barrier seals help maintain the security of transported goods and ensure compliance with industry regulations.
Frangible Film Labels
Frangible film labels are manufactured from delicate, brittle materials that break apart when peeled or disturbed. The film shatters, leaving evidence of tampering and making restoring the label to its original state impossible. These labels are ideal for high-security applications, such as sealing sensitive documents, securing pharmaceutical packages, or protecting electronic devices, ensuring that the integrity of the product remains uncompromised.
Holographic Security Labels
Holographic security labels incorporate advanced hologram technology, providing a visual deterrent and making it difficult for counterfeiters to replicate. These labels often include multiple layers of security, such as 3D effects, micro-text, or hidden images that become visible under specific lighting or angles. They are widely used for brand protection on luxury goods, pharmaceuticals, and electronics, ensuring that any attempt to tamper with or duplicate a product is immediately apparent and traceable.
Non-Residue Labels
Non-residue labels are designed to indicate tampering without leaving adhesive residue behind. When removed, these labels reveal a hidden message on the surface or the label itself but maintain a clean surface. This type is commonly used for high-value items or products where cleanliness is essential, such as pharmaceuticals.
Part Residue Labels
A hybrid solution that combines features of both residue and non-residue labels. When tampered with, they leave a partial adhesive residue or pattern, providing visible evidence of interference while keeping surfaces relatively clean. These labels are ideal for applications requiring tamper evidence without the whole adhesive mess left by standard residue labels. They are often used for electronics, pharmaceuticals, and packaging where tamper detection is essential, but maintaining a cleaner appearance is also valued.
Residue Labels
When tampered with, residue labels leave a visible adhesive residue. This residue reveals a warning message or pattern, making it clear that the label has been removed or altered. Residue labels are ideal for applications where immediate visual evidence is needed, such as on electronic packaging or sensitive documents.
Specialty Hybrid Labels
Speciality hybrid and part-residue labels combine features of both residue and non-residue labels. They may leave partial residue or have sections designed to detach upon tampering. These labels offer flexibility for various applications, balancing tamper evidence and the need for a clean surface.
Temperature Sensitive Labels
Temperature-sensitive labels provide tamper evidence through thermal response. These labels change colour or reveal hidden messages when exposed to specific temperature variations, such as extreme heat or cold. They benefit products that must maintain a stable environment, like vaccines, food items, or chemical containers. The temperature-sensitive properties alert handlers to improper handling or unauthorised access, maintaining product safety throughout its lifecycle.
Ultra-Destructible Paper Labels
Ultra-destructible paper labels are designed to fragment into tiny pieces when tampered with, making removing or reapplying them cleanly impossible. The material is susceptible and shatters upon contact, providing an immediate and visible sign of interference. These labels are frequently used on electronics, automotive parts, and other high-value products where it is essential to detect even the slightest tampering attempt to prevent theft or counterfeiting.
Vinyl Destructible Labels
Vinyl destructible labels are engineered to break into tiny fragments when tampered with, making it impossible to remove them intact. This property makes them a popular choice for high-security applications, such as sealing essential equipment or securing valuable assets, ensuring any tampering attempt is immediately evident.
Void Labels
Void labels are tamper-evident labels that reveal a hidden message, often the word "VOID," when removed or tampered with. These labels are designed to provide clear and immediate evidence of unauthorised access or interference with a product. Once the label is lifted, it leaves a permanent mark on the surface, making it impossible to reseal without detection. Void labels are commonly used in electronics, pharmaceuticals, and logistics industries to secure sensitive items and prevent tampering or theft.
Choosing the Right Label Material
Selecting the appropriate label for your needs depends on various factors, including the type of product, the packaging material, and the level of security required. Here are some considerations:
Material Compatibility - How can Surfaces Affect Labels
Ensure the label is compatible with the surface of your product’s packaging, whether it’s glass, plastic, metal, or paper. The effectiveness of security labels can be influenced by the type of surface to which they are applied. Smooth surfaces, like glass or polished metal, typically allow labels to adhere well, ensuring tamper evidence is easily detected.
However, rough or textured surfaces, such as cardboard or certain plastics, can make it harder for the adhesive to create a strong bond, which may reduce the effectiveness of the tamper evident features. Additionally, contaminated surfaces with dust, oil, or moisture can prevent the label from sticking properly, compromising security. It's crucial to match the label material and adhesive with the intended surface for optimal security performance.
Ease of Application
Select labels that are easy to apply, primarily if your business handles high volumes of products. Automated labelling systems are often compatible with tamper-evident labels, streamlining the process.
Customisation Options
Custom tamper evident labels can be tailored to fit your branding and security needs. Consider incorporating your logo, serial numbers, or QR codes for added security and brand recognition.Some custom options your might see are:
Customer Surface Markings
Security labels can be personalised with your company logo, security alert, unique numbering, barcode, and more. These visible security labels act as a deterrent to anyone with harmful intent, while also promoting your brand. Alternatively, 'hidden' security labels may be your preference—these appear as ordinary labels but reveal tamper evidence once removed, catching fraudsters off guard.
Custom Void Message
Customising the void message beneath the surface when the label is removed is possible, adding uniqueness to your labels. This feature is especially beneficial for hidden labels, as the void message or security number will inform users of any security breach during transit.
Colour Options
Labels can be designed to enhance both aesthetics and security, ensuring that they convey your brand’s identity effectively.
Security Cuts – Easy-Break Labels
By adding security cuts in the middle of the label during production, a weak point is created that causes the label to break apart when pulled. These cuts are particularly useful for applications where quick access is needed, such as on doors or cabinets. The label will break when tampered with, eliminating the need to fully remove it first, thus providing both security and convenience in accessing sealed areas.
SEL or LEL Configuration
We offer security labels in Short Edge Leading (SEL) and Long Edge Leading (LEL) configurations. Your choice can depend on personal preference or the requirements of label applicators, whether machine-operated or manual.
Die-Cut Labels
We have an extensive range of cutting tools available, from uniquely shaped die-cut designs for vials and bottles to large-format labels for shipping pallets. We can create a custom cutting tool to match your needs if a specific shape is required.
Specialist UV Inks
For high-security applications, tamper-evident labels can be designed to reveal a void message only under UV light. This allows the fraudster's actions to go unnoticed until checked with a UV source. This technique provides discreet tamper detection for sensitive packages.
Counterpart Security Numbers
Counterpart or dual-number labels offer a simple solution for tracking security numbers. A detachable portion of the label can be affixed to accompanying documents, allowing for easy cross-referencing with the security seal used on a package.
Finger Lift Labels
'Finger lift' labels are designed with non-adhesive edges, making them easier to peel from the backing paper during manual application.
Finish Options
Security labels are typically supplied with a matt finish, but a glossy finish is also available for those who prefer a different aesthetic.
Paper-Based Labels
Paper-based labels help reduce the use of single-use plastics in your supply chain while maintaining security and chain-of-custody integrity.
Temperature-Sensitive Labels
These labels change colour or reveal a message when exposed to extreme temperatures, alerting you to tampering that involves heat or freezing. They are ideal for protecting temperature-sensitive shipments like pharmaceuticals or food products.
Water-Activated Labels
Water-activated security labels offer an extra layer of protection for environments where labels are likely to come into contact with water or moisture. Once tampered with or exposed to water, these labels leave a clear mark or void message, ensuring security isn't compromised by environmental factors.
Holographic Labels
Holographic security labels add another visual deterrent by incorporating unique, multi-dimensional images that are difficult to replicate. This makes it easier for users to visually confirm authenticity and tamper evidence while enhancing the brand’s perceived value.
RFID-Embedded Labels
RFID technology can be embedded in security labels for more advanced tracking needs. This allows real-time monitoring of packages through RFID scanners, providing added visibility and traceability throughout the supply chain.
Scratch-Off Labels
These labels feature a scratch-off layer that reveals a code or message underneath. This can be used to verify authenticity or provide instructions for accessing a product securely, which is commonly used in digital security or access control applications.
Tamper-Evident Tape
For more oversized or bulk packaging, tamper-evident tape might be a valuable alternative to individual labels. The tape can be custom-printed and, when removed, will reveal tampering through visible void patterns.
Anti-Counterfeit Inks
These speciality inks reveal hidden marks or patterns under specific light conditions, such as infrared or ultraviolet. This can protect against counterfeiting or tampering, especially in high-value or sensitive products.
Digital QR Codes for Authentication
QR codes can be added to labels to link to a secure online verification platform. Customers can scan the QR code to confirm the product's authenticity and check if the security seal has been compromised.
Time-Release Void Labels
These labels only reveal a tamper-evident void message after a specific period, making it harder for fraudsters to cover up their tampering within a short window. They are ideal for time-sensitive or high-security shipments.
Frangible Film Labels
These labels are made from ultra-thin, brittle material that breaks apart if any attempt is made to remove them. These are particularly useful for applications where it’s vital to prevent label removal without leaving apparent evidence of tampering.
Multi-Layered Labels
These consist of several layers that can incorporate multiple security features, such as a combination of holography, barcodes, and tamper-evident void messages. Once tampered with, the different layers reveal increasingly complex security measures, deterring fraudsters.
Temperature Resistance
If your products are exposed to varying temperatures, choose tamper-evident labels that can withstand extreme conditions without losing their adhesive properties.
The Benefits of Using Labels
Implementing tamper evident labels comes with a host of advantages that not only protect your products but also enhance your brand reputation and consumer trust:
Enhanced Product Security
They provide an extra layer of security, deterring potential tampering and unauthorised access. They are particularly valuable in industries like pharmaceuticals, food and beverage, and electronics, where product integrity is vital.
Regulatory Compliance
Many industries have strict regulations that mandate the use of tamper-evident solutions to ensure product safety. By integrating tamper-evident labels, businesses can comply with these regulations and avoid legal complications.
Brand Trust and Credibility
When customers see a tamper-evident label, they gain confidence that their product has not been altered. This level of assurance is crucial for maintaining customer trust, especially in high-value or sensitive markets.
Traceability and Tracking
Tamper-evident labels can be combined with other tracking technologies, such as barcodes or RFID tags, to provide complete visibility over a product's journey. This is beneficial for logistics and supply chain management, where traceability is essential for monitoring goods and managing recalls effectively.
In conclusion, tamper evident labels play a vital role in securing products, protecting brand integrity, and ensuring customer trust. With a wide range of options available, from void labels to specialty hybrid solutions, businesses can choose the most suitable label for their specific needs. The right label type, combined with consideration of surface compatibility, provides an effective barrier against tampering and unauthorised access. By integrating tamper evident labels into your packaging strategy, you can enhance security and maintain compliance with industry standards. Choose wisely to protect what matters most.
