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Silver Twin - HF and LF Shielding Fabric Zoom

Silver Twin - HF and LF Shielding Fabric



£ 76.60
- +

Silver Twin is a compact Cotton / Silver fabric for the protection against high-frequency radiation. Typical application as curtain, to sew clothes, handy bags, etc.

Width: 150 cm

Length: 1 linear meter

Special feature: The frontside is made of white cotton, while the backside is densely woven with a silver thread. Despite the extremely high attenuation due to the dark silver threads on the backside, this fabric has a light gray frontside!


  • Maximum high screening attenuation, even at very high frequencies!

  • Excellent cost/performance ratio

  • Contactable (groundable) to shield LF electric fields

  • Textile characteristics: Washable, easy to iron and process

  • Quality grade: Very high


Technical data

  • Width: 150 cm, +/- 2 cm

  • Length: Available by the meter

  • Attenuation: 57 dB at 1 GHz

  • Color: Frontside light gray, backside silver. Attention: Due to silver oxidation the front side can have very slight discolouration, this is no quality defect!

  • Raw materials: 50 % cotton, 35 % polyester, 15 % silver

  • Weight: 150 g/m²

  • Dimension stability: +/- 3 %

  • Surface conductivity: 0.25 ohm / inch (2.54 cm)



Due to the surface conductivity this fabric can be grounded to shield low frequency (LF) electric fields. For professional grounding we recommend our Grounding-Plug EST.


Shielding attenuation

The shielding attenuation is regularly tested in our own laboratory or by Professor Dipl.Ing. Pauli at the University of the German Federal Armed Forces in Munich due to the standards ASTM D4935-10 and/or IEEE-STD-299-2006. The line in the diagram stands for the radial direction of polarisation (both directions, horizontal/vertical) and indicates the attenuation achievable in practice.

Silver Twin Fabric EMF Shielding Graph



Cleaning in a washing machine at 30°C with our special washing detergent. No handwashing! Use only Leblok washing powder. (Other detergents MAY have a severe effect on shielding level)

For allergic persons: Every new fabric smells! Always wash before its first usage!


Discoloration of silver

Something that other suppliers keep quiet about: This product consists of silver, that will discolor over the time! Stained places have no negative effects on the screening attenuation and they are no quality defect!


About the fabrics quality

 This fabric is woven with a high content of silver- or stainless steel threads. Naturally, we only sell top quality fabrics processed for us in five different weaving mills, each one of them certified according to established norms. However, we cannot guarantee that there are absolutely no defects. We always cut out any visible defects from yard goods and curtains! Tiny defects, such as small flaws in weaving are no reason for complaint. The background to this are the usual high production costs in the textile industry which do not allow us as well as weaving mills to discard large amounts of production batches. We appreciate your understanding.


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