Sigint Solutions


SILVER-TWIN Shielding Fabric

 silver-twin shielding fabric
SILVER-TWIN is a compact, double-ply cotton/silver fabric for HF+LF shielding. Typical application as curtain, to sew thicker clothes, handy bags, etc.

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SILVER-TWIN is an cotton fabric that contains silver with high screening attenuation. The frontside is made of white cotton, while the back side is densely woven with a silver thread. Despite the extremely high attenuation due to the dark silver threads on the backside, the fabric has a light gray front side. It is also contactable(groundable) to shield LF electric fields. SILVER-TWIN is washable, easy to iron and process and has a high quality grade.

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. graph - naturell shielding fabric

The fabric contains silver, that can discolorate in some cases in a very high degree. For more information please refer to Discoloration of silver.

Technical Data

  • Width: 150 cm, +/- 2 cm
  • Length: Available by the meter, 150 meter rolls
  • Attenuation: 57 dB at 1 GHz
  • Color: Frontside light gray, backside silver
  • Raw materials: 50 % cotton, 35 % polyester, 15 % silver
  • Weight: 150 g/m²
  • Surface conductivity:0.25 ohm (square resistance R2)


Material Handling

Gentle cycle at 30°C.
Use detergent without
softeners and enzymes!

Iron without steam
at degree 1.

No bleaching.

No chemical

Cleaning in a washing machine at 30°C with our special washing detergent TEXCARE. No handwashing!
For allergic persons: Every new fabric smells, always wash before its first usage!

Discoloration of Silver

We make it clear to our customers that fabrics containing silver threads will discolor over time, something that other suppliers keep quiet about! This typical characteristic of silver can sometimes even be noticed on fabrics that come straight from the factory. The reasons for this are direct sunlight, heat from the radiator, splashes from the cleaning water etc. Sometimes the fabrics are yet discolored, when we get it from the manufacturer.
Important: Stained places have no negative effects on the screening attenuation at all and they are no quality defect! If you cannot accept any discolorations you should have a look at the product table overview. There you will find various fabrics which are not subject to discolorations. The following are (admittedly extreme) examples of such discolorations and how they look like at worst:
discoloration of silver