Medical & Security Labels
VOID Tamper-Evident Labels – Leave "VOID" Mark When Peeled
Security labels that leave a permanent "VOID" message when removed. Provides clear evidence of tampering, unauthorised opening, or product replacement. Ideal for warranty seals, electronics packaging, pharmaceutical cartons, and logistics applications requiring tamper verification.
Specifications
- Reveal message
- "VOID" (standard) / "OPENED" / Custom text
- Material
- PET / Vinyl / Paper
- Adhesive
- Tamper-evident acrylic (non-transferable)
- Color
- Silver, white, red, blue, holographic, custom
Security labels that leave a permanent "VOID" message when removed. Provides clear evidence of tampering, unauthorised opening, or product replacement. Ideal for warranty seals, electronics packaging, pharmaceutical cartons, and logistics applications requiring tamper verification.
Specifications
Items | Details |
|---|---|
Type | Tamper-evident (peel-reveal) security label |
Reveal message | "VOID" (standard) / "OPENED" / Custom text |
Material | PET / Vinyl / Paper |
Adhesive | Tamper-evident acrylic (non-transferable) |
Thickness | 50µm, 75µm |
Color | Silver, white, red, blue, holographic, custom |
Temperature range | -20°C to +80°C |
Print compatibility | Thermal transfer (resin ribbon) / Flexographic |
Label size | Custom die-cut from 10mm x 10mm to 150mm x 100mm |
Core diameter | 1 inch (25.4mm) or 3 inch |
Shelf life | 2 years (store in cool, dry conditions) |
Custom reveal text, colors, holographic patterns, and sequential numbering available upon request.
Key Features
- ✅ Permanent tamper evidence – When the label is peeled, a "VOID" message remains on both the label and the substrate. The message cannot be removed or hidden.
- ✅ Non-transferable adhesive – The adhesive splits during removal, leaving residue on the substrate that cannot be reapplied or transferred to another surface.
- ✅ Instant visual verification – No special tools needed – a quick glance confirms whether a package has been opened or tampered with.
- ✅ Custom reveal messages – Available with "VOID", "OPENED", "STOP", or custom text in multiple languages.
- ✅ High-security options – Holographic patterns, sequential serial numbers, and UV-visible markings available for enhanced anti-counterfeiting.
- ✅ Strong initial adhesion – Bonds firmly to plastic, metal, glass, cardboard, and painted surfaces. Cannot be removed without leaving evidence.
- ✅ Print-friendly surface – Accepts thermal transfer printing (resin ribbon) for barcodes, serial numbers, logos, and text.
- ✅ Wide material selection – Available in PET, vinyl, and paper to suit different substrates and budgets.
How VOID Tamper-Evident Labels Work
The label uses a specialised adhesive and facestock construction that separates when peeled:
Layer | Function |
|---|---|
Facestock | Carries the printed information and reveal message |
Release coating | Allows the facestock to separate from the adhesive |
Tamper-evident adhesive | Bonds permanently to the substrate; cannot be removed cleanly |
Reveal layer | Contains the "VOID" message – becomes visible when the label is peeled |
What happens when someone tries to remove the label:
- The facestock separates from the adhesive layer
- The "VOID" message is revealed on the substrate
- The label cannot be reapplied – it is permanently damaged
- Any attempt to remove the residue leaves visible marks
💡 Note: Tamper-evident labels provide visible evidence of tampering. They are a deterrent and detection tool – not a guarantee against all forms of intrusion. For maximum security, combine with serial numbers, holograms, or RFID.
Applications
Use VOID Tamper-Evident Labels for:
- Warranty seals – Applied to electronics, appliances, and equipment to void the warranty if opened. Prevents unauthorised repairs or component swaps.
- Electronics packaging – Seals on phone boxes, laptop cartons, and accessory packaging to confirm the product has not been opened or replaced.
- Pharmaceutical cartons – Tamper verification on medicine boxes, vials, and blister packs. Provides evidence of product integrity.
- Logistics & shipping – Security seals on shipping cartons, pallets, and containers to detect unauthorised access during transit.
- Cosmetics & luxury goods – Anti-counterfeiting seals on perfume boxes, skincare packaging, and premium products.
- Food & beverage – Tamper seals on bottle caps, jar lids, and food delivery containers.
- Document security – Seals on envelopes, folders, and confidential documents to detect unauthorised access.
- Asset management – Labels on IT equipment, servers, and instruments to detect unauthorised opening or modification.
Printer & Ribbon Compatibility
Printing methods:
- Thermal transfer – Print barcodes, serial numbers, logos, and text using resin ribbon.
- Flexographic printing – For high-volume pre-printed labels with fixed information.
- Pre-printed – We can supply labels pre-printed with your logo, serial numbers, or custom reveal text.
Recommended ribbons:
- Resin ribbon – Required for maximum durability and adhesion on tamper-evident facestock. Wax/resin ribbons may not adhere properly to the security coating.
Compatible printers:
Most industrial thermal transfer printers from Zebra, Honeywell, Sato, TSC, Citizen.
Printer settings suggestion:
- Darkness: 25–30%
- Speed: 2–4 inches per second (ips)
⚠️ Note: Always test a small batch on your actual substrate before full production. Tamper-evident performance depends on the substrate surface and application pressure.
How to Choose the Right VOID Tamper-Evident Label
Step 1: Choose the Substrate Material
Substrate | Recommended Label Material | Notes |
|---|---|---|
Plastic (PP, PE, ABS) | PET or Vinyl | Good adhesion; test for low-surface-energy plastics |
Metal | PET | Excellent adhesion and clean reveal |
Glass | PET or Paper | Clean removal with visible VOID |
Cardboard / Paper | Paper or PET | Choose based on required durability |
Painted surfaces | PET | Avoid vinyl on fresh paint |
Step 2: Choose the Reveal Message
Message | Best For |
|---|---|
VOID | Universal – most common |
OPENED | Clear communication for consumers |
STOP | High-visibility for security applications |
Custom text | Brand-specific or multilingual requirements |
Step 3: Choose the Security Level
Security Level | Features |
|---|---|
Standard | "VOID" reveal message, non-transferable adhesive |
Enhanced | Sequential serial numbers + VOID message |
High security | Holographic pattern + serial numbers + UV marking |
Maximum security | Custom hologram + tamper-evident + QR code + serialisation |
Step 4: Choose the Label Size
Application | Typical Size |
|---|---|
Small electronics boxes | 10mm x 10mm to 20mm x 20mm |
Warranty seals | 20mm x 10mm to 40mm x 20mm |
Shipping cartons | 50mm x 25mm to 100mm x 50mm |
Large packaging | Up to 150mm x 100mm |
Step 5: Choose Pre-Printed or Printable
Option | Best For |
|---|---|
Pre-printed | High-volume users – no printer needed; fixed information |
Printable | Variable data (serial numbers, dates, barcodes) |
Ordering & Sample Information
- MOQ: 50 roll for standard blank labels; custom die-cut – MOQ 100 rolls.
- Free sample: 100 pieces available for testing. Test on your actual substrate.
- Custom printing: Logo, serial numbers, barcodes, QR codes – MOQ 5,000 pcs.
- Custom reveal text: Available in multiple languages – MOQ 5,000 pcs.
- Holographic options: Available upon request – MOQ 10,000 pcs.
- Lead time:
- Stock sizes: 3–5 business days
- Custom die-cut or printed: 10–15 business days
- Holographic or custom: 20–25 business days
⚠️ Important: Tamper-evident performance depends on correct application. Apply to clean, dry surfaces with firm, even pressure. Allow 24 hours for full adhesion before testing.
