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home:special:emf:protective_materials [10.13.2018] – [Cleanup] sallieq | home:special:emf:protective_materials [09.14.2022] (current) – external edit 127.0.0.1 | ||
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//related articles// | //related articles// | ||
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* [[home: | * [[home: | ||
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===== Summary table ===== | ===== Summary table ===== | ||
^ Material | ^ Material | ||
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| 50 Mesh High Transparency | | 50 Mesh High Transparency | ||
| 100 Mesh High Transparency | | 100 Mesh High Transparency | ||
- | | HEG03 | very high up to 2.4GHz, not so good at higher frequencies - [[http:// | + | | HEG03 | very high up to 2.4GHz, not so good at higher frequencies - [[https:// |
- | | V4A03 | ? | very high | none | ? | Semi-rigid mesh, weldable | [[http:// | + | | V4A03 | ? | very high | none | ? | Semi-rigid mesh, weldable | [[https:// |
| Atticfoil, solid, single-sided | | Atticfoil, solid, single-sided | ||
| Atticfoil, solid, double-sided | | Atticfoil, solid, double-sided | ||
- | | SafeLiving RF Shielding Foil | very high, [[http:// | + | | SafeLiving RF Shielding Foil | very high, [[https:// |
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The mesh for front of the driving-hood, | The mesh for front of the driving-hood, | ||
- | [[http:// | + | [[https:// |
It shields very nicely, >50dB at 1Ghz, >40dB at 5GHz (>70dB below 100MHz). | It shields very nicely, >50dB at 1Ghz, >40dB at 5GHz (>70dB below 100MHz). | ||
The stuff which came today was this: | The stuff which came today was this: | ||
- | [[http:// | + | [[https:// |
and it is four times as dense, but still 80% transparent and handles like cloth. This stuff shields to 70GHz, to handle the new anti-collision radars | and it is four times as dense, but still 80% transparent and handles like cloth. This stuff shields to 70GHz, to handle the new anti-collision radars | ||
- | http:// | + | https:// |
- Trevor | - Trevor | ||
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The best shielding is either 1/8" mesh or 1/8" circles in a flat sheet, which you can put over the vents with at least 6" overlap all around. The holes in this are a little big, but should do OK at 2.4Ghz for 15-20dB or so: | The best shielding is either 1/8" mesh or 1/8" circles in a flat sheet, which you can put over the vents with at least 6" overlap all around. The holes in this are a little big, but should do OK at 2.4Ghz for 15-20dB or so: | ||
- | [[http:// | + | [[https:// |
You can also use ' | You can also use ' | ||
- | [[http:// | + | [[https:// |
- Trevor | - Trevor | ||
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The paint used is Y-shield HSF54 | The paint used is Y-shield HSF54 | ||
- | [[http:// | + | [[https:// |
plus the additive AF3: | plus the additive AF3: | ||
- | [[http:// | + | [[https:// |
It is important not to paint it onto surfaces that are coated with the more natural mineral-based paints, or to use these to cover it. Ordinary household emulsion paint is fine. It may take 3-4 coats to cover the Y-shield, unless you like having black walls | It is important not to paint it onto surfaces that are coated with the more natural mineral-based paints, or to use these to cover it. Ordinary household emulsion paint is fine. It may take 3-4 coats to cover the Y-shield, unless you like having black walls | ||
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The surface you are painting onto must not be porous otherwise the shielding will be compromised. This is unlikely to be a problem over existing paint and wallpaper, but would matter over new plaster or plasterboard. Yshield recommend you test a small area. If you get a silvery/ | The surface you are painting onto must not be porous otherwise the shielding will be compromised. This is unlikely to be a problem over existing paint and wallpaper, but would matter over new plaster or plasterboard. Yshield recommend you test a small area. If you get a silvery/ | ||
- | It also doesn’t make sense to put Yshield over paint that is flaking or surfaces with cracks. I had both of these issues with my bedroom ceiling, but coincidentally had just fixed exactly the same issues in another room. For fixing the slightly flakey/ | + | It also doesn’t make sense to put Yshield over paint that is flaking or surfaces with cracks. I had both of these issues with my bedroom ceiling, but coincidentally had just fixed exactly the same issues in another room. For fixing the slightly flakey/ |
==== Mixing ==== | ==== Mixing ==== | ||
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Mixing and the fibre additive | Mixing and the fibre additive | ||
- | Yshield depends on carbon particles for its effectiveness, | + | Yshield depends on carbon particles for its effectiveness, |
A lot of mixing is also needed to get the fibre additive evenly distributed within the paint. I used a whole jar of the fibre additive for each 5 litres. It’s black, sticky and fibrous and sits in clumps in the paint unless you mix it in very well. Again, I wouldn’t want to do it by hand. | A lot of mixing is also needed to get the fibre additive evenly distributed within the paint. I used a whole jar of the fibre additive for each 5 litres. It’s black, sticky and fibrous and sits in clumps in the paint unless you mix it in very well. Again, I wouldn’t want to do it by hand. | ||
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Covering it:- only certain types of paint can go over the top of it, so I’ll be doing some investigation and testing. But the finish is very soft and marks very easily, so needs covering up otherwise is likely to become damaged. | Covering it:- only certain types of paint can go over the top of it, so I’ll be doing some investigation and testing. But the finish is very soft and marks very easily, so needs covering up otherwise is likely to become damaged. | ||
- | {{tag> | + | {{tag> |
+ | < | ||
===== Notes and comments ===== | ===== Notes and comments ===== | ||
+ | </ | ||