On-metal NFC tags have a very thin ferrite layer between the chip and the adhesive part, in order to isolate the magnetic field of any metal surfaces. As a result, they can only be read on the non-adhesive side, and can also be applied to metal surfaces.

Technical specifications

• Manufacturer: Confidex
• Confidex product code: 3003272 (NTAG213)
• Confidex product name: Confidex Steelwave HF On-metal 
• Synthetic white surface, printable with resin ribbon
• Permanent adhesive for general use
• Applicable also on metal surfaces
• Dimensions: 25 x 25 mm
• Thickness: 0.46 mm
• Weight: < 1 g

Environmental resistance

• Operating temperature: -35°C ~ +85°C
• Storage temperature: -35°C ~ +90°C
• Good, tested 5 hours in 1m deep water (IP68)
• Duration of adhesive: 1 year (in standard conditions 20°C / 50% RH)

Resistance to chemicals

No physical deterioration or performance after exposure to:

• 168 hours in salt water (10% salinity)
• 24 hours in sulfuric acid (10%, pH 2)
• 168 hours with engine oil
• 24 hours sodium hydroxide (10% NaOH, pH 13)
• 20 minutes acetone

Contactless chip

• Manufacturer: NXP
• Operating frequency: 13.56 MHz
• Available memory: 144 byte
• Compatible with all NFC smartphones
• Data retention: up to 10 years
• Read/Write Endurance: 100,000 cycles

All our NFC tags are tested before shipment.

Custom printing

These NFC Tags are white. We can print directly on this tag, in black and white or in full color.

A printing tolerance of about 1-2 mm should be considered. To achieve the best results, it is recommended to avoid:

• Designs printed to the edge (except from offset printing)
• Graphic elements such as frames
• Important elements very close to the edge

Black printing (1-2 days) is done with the thermal transfer technique. It is a low quality print, but very resistant and economical. It is normally used for serials, barcodes or QR codes. However, simple logos can also be printed.

UV printing (1-5 days) is a color printing technique that can be performed directly on white labels. The print is in CMYK and the result is semi-opaque. UV printed labels are supplied in strips (not on rolls).
This method is ideal for small runs (typically under 500 pieces). For larger runs, we recommend Premium Express printing or offset printing. Contact us for more information.

Offset printing (5-8 weeks) is carried out with the Offset technique, during the label production process. It offers the best print quality ever. The file for printing must be in CMYK, possibly vector.