Onion skin or fragile security labels are special tamper-evident labels designed to break apart or leave visible signs when someone attempts to remove them. They are widely used for warranty protection, electronics, technical service applications, asset tracking, and product security.
What Is Onion Skin Paper?
Onion skin paper is a term commonly used in the label industry for special security label materials designed to show whether a product has been opened, tampered with, or accessed without authorization.
These products may also be referred to as onion skin labels, fragile labels, destructible labels, warranty labels, tamper-evident labels, or security labels.
Unlike standard adhesive labels, their main purpose is not only to display information but also to help prevent the label from being removed in one piece and reused on another product.
When someone attempts to remove a fragile security label, the material may break into small pieces, lose its integrity, or leave visible evidence on the surface. This makes unauthorized intervention much easier to detect.
What Is an Onion Skin Label?
An onion skin label is a special type of security label commonly used for warranty and tamper-evident applications.
The name comes from the way the material can separate, tear, or break into thin layers when removal is attempted.
Unlike standard coated paper or PP labels, the main purpose of an onion skin label is to provide product security and evidence of tampering.
Depending on the application, onion skin security labels may be manufactured from different fragile, plastic-based, vinyl-based, or paper-based materials.
For this reason, the term “onion skin label” may refer to different materials that provide a similar tamper-evident security function.
What Is a Fragile Security Label?
A fragile security label, also known as a destructible label, is a special adhesive label designed to lose its structure when someone attempts to remove it.
After the label has bonded firmly to the surface, it cannot usually be removed in one piece.
Instead, it breaks into small fragments.
This feature makes it very difficult to transfer the label from one product to another or remove and reapply it without leaving visible evidence.
Fragile security labels are especially useful on screws, covers, housings, enclosures, and other areas where unauthorized access needs to be detected.
How Do Onion Skin and Fragile Labels Work?
Standard adhesive labels can sometimes be carefully removed from a surface without major damage.
Fragile security labels are designed differently.
Their material structure and adhesive system are developed so that removing the label damages the label itself.
When removal is attempted, the label may tear into small pieces, separate in layers, deform permanently, or leave visible signs of tampering.
As a result, the label cannot easily be restored to its original condition.
For this reason, onion skin and fragile labels are not just printed labels; they are also tamper-evident security solutions.
Where Are Onion Skin Labels Used?
Onion skin and fragile security labels can be used in many different industries and applications.
Common areas of use include:
- Electronic devices
- Computers and IT equipment
- Technical service and repair products
- Warranty seals
- Automotive parts
- Spare parts
- Industrial machinery
- Electrical panels
- LED and lighting products
- Asset and inventory tracking
- Barcode and serial number applications
- Rental equipment
- High-value products
- Packaging requiring tamper evidence
These labels are especially useful wherever unauthorized opening, removal, replacement, or product intervention needs to be detected.
Fragile Warranty Labels for Electronic Products
One of the most common uses of fragile security labels is on electronic devices.
They can be applied to screws, covers, housings, or other access points on products such as computers, modems, adapters, circuit boards, power supplies, electronic controllers, and similar equipment.
If someone opens the product, the label will usually be damaged or broken.
This allows technical service teams, manufacturers, or distributors to identify whether the product may have been opened previously.
The labels can also be printed with company logos, product codes, serial numbers, barcodes, QR codes, warranty information, or custom security messages.
Use as a Warranty Label
Onion skin and fragile labels are frequently used as warranty labels.
The label is normally placed over a screw, opening point, enclosure joint, or another area that should remain closed.
If someone attempts to open the product, the label becomes damaged or breaks apart.
This provides visible evidence that the product may have been accessed.
However, warranty conditions should always be evaluated according to the manufacturer's warranty terms, sales conditions, and applicable consumer regulations.
Serial Number and Barcode Security Labels
Fragile security labels can also be used for product identification and asset tracking.
Variable information such as:
- Serial numbers
- Product codes
- Barcodes
- QR codes
- Batch numbers
- Asset numbers
can be printed on the label.
This allows the security label to serve both as a tamper-evident solution and as part of an inventory or product tracking system.
Serial-numbered security labels are especially useful for electronics, machinery, spare parts, company assets, technical service equipment, and high-value products.
What Is the Difference Between a Fragile Label and a VOID Label?
Fragile security labels and VOID labels can serve similar security purposes, but they work differently.
A fragile or destructible label usually breaks into pieces when someone attempts to remove it.
A VOID security label, on the other hand, may leave a visible message such as:
- VOID
- OPENED
- SECURITY
- TAMPERED
on the surface or inside the label structure after removal.
Both systems are designed to make tampering visible.
The right choice depends on the product surface, application, security level, appearance requirements, and the type of evidence you want the label to provide.
Advantages of Fragile Security Labels
Fragile security labels provide several important advantages.
They help prevent label transfer, unauthorized removal, and reuse.
They can also:
- Provide visible evidence of tampering
- Help protect warranty seals
- Support product identification
- Carry serial numbers and barcodes
- Be customized with logos and security messages
- Be manufactured in small sizes
- Be applied over screws and narrow areas
- Support inventory and asset tracking
Because they are designed to lose their integrity when removed, they provide an effective solution for many product security applications.
Can Onion Skin Labels Be Printed?
Yes.
Depending on the material, onion skin and fragile security labels can be printed with:
- Company logos
- Brand names
- Barcodes
- QR codes
- Serial numbers
- Product numbers
- Warranty statements
- Security warnings
- Custom designs
Some roll-format fragile labels may also be suitable for thermal transfer barcode printers.
In these applications, the ribbon type must be compatible with the surface material.
Depending on the label material, wax/resin or resin ribbons may be preferred.
How to Choose the Right Security Label
The surface on which the label will be applied is one of the most important factors when selecting a security label.
Different surfaces may require different adhesive systems.
The label may need to be applied to:
- Metal
- Plastic
- Glass
- Painted surfaces
- Cardboard
- Electronic enclosures
- Machinery components
You should also consider whether the label will be used indoors or outdoors, exposed to heat or moisture, printed with variable data, or required to leave a specific type of tamper evidence.
If the label should break apart when removed, a fragile / destructible label may be suitable.
If the label should leave a security message or pattern behind, a VOID label may be a better option.
Onion Skin and Fragile Security Label Production
Onion skin labels, fragile security labels, destructible labels, and warranty labels are effective solutions for product security, warranty control, and tamper detection.
Depending on the application, these labels can be manufactured in different sizes and printed with logos, barcodes, QR codes, serial numbers, and custom security messages.
When selecting the right security label, it is important to evaluate the application surface, label dimensions, printing requirements, order quantity, environmental conditions, and required security function together.
YAYEX Etiket offers customized solutions for onion skin labels, fragile security labels, destructible labels, warranty labels, and tamper-evident labels.
You can contact us with your required size, quantity, application surface, and intended use to receive a suitable security label solution and quotation.