| General > General Technical Chat |
| Quite nervous doing this... |
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| paulca:
Yes, I'm currently considering laying heavy underfelt over it and putting a draft strip around the door. It doesn't have to be pretty, it's an under stairs cupboard. Also I think the "foil" is just metalized plastic sheet, it's probably only 1 or 2 atoms of aluinium thick to create the thermal mirroring. |
| TK:
--- Quote from: paulca on January 24, 2020, 02:57:11 pm ---Yes, I'm currently considering laying heavy underfelt over it and putting a draft strip around the door. It doesn't have to be pretty, it's an under stairs cupboard. Also I think the "foil" is just metalized plastic sheet, it's probably only 1 or 2 atoms of aluinium thick to create the thermal mirroring. --- End quote --- :palm: |
| paulca:
--- Quote from: TK on January 24, 2020, 03:12:53 pm --- --- Quote from: paulca on January 24, 2020, 02:57:11 pm ---Yes, I'm currently considering laying heavy underfelt over it and putting a draft strip around the door. It doesn't have to be pretty, it's an under stairs cupboard. Also I think the "foil" is just metalized plastic sheet, it's probably only 1 or 2 atoms of aluinium thick to create the thermal mirroring. --- End quote --- :palm: --- End quote --- You know how mirroring of surfaces works in the modern world and how they can use silver to coat mirrors and not have it cost thousands? They vapourise the metal (or metal compound) and allow it to condense onto the electrically charged surface forming a layer with is literally only a few atoms thick but creates a perfect mirror effect. Even electroplating can be done to produce extremely thin layers. Food packaging with "foil" is quite often actually plastic with an extremely thin layer of metal to make it look like foil. Crisp packets for example. |
| Monkeh:
--- Quote from: andy3055 on January 23, 2020, 09:07:50 pm ---That looks pretty dangerous and could be against the local code! --- End quote --- ?! Double insulated cabling, what's the problem? |
| Twoflower:
A telescope mirror has a coating about 100nm a diameter of an Al atom is about 125pm. So I think that's a bit more than 1 or two atoms. An Al is cheap, so even a 1mm layer wouldn't cost a fortune compared to the whole thing. If interested spend some time watching this (Recoating a Giant VLT Mirror): |
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