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conductive paint Answered

do any of you have experience with conductive paint?

does it have much resistance? 

i'm thinkin of heating car windsheild in much the same way that the rear window is done. 

i've cracked 1 or windsheilds while defrosting. seems thermal shock from heat vents on dash are too much. just got a new windsheild.  don't want to break it.

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Jack A Lopez
Jack A Lopez

5 years ago

I am guessing you want something that is transparent, as well as resistive, so you can see through it, for to see the road.

Because if you don't need to see the road to drive, then there's no reason to bother defrosting the windshield.

Back to the subject of things that are both transparent and resistive. Such things exist, but I think it may be challenging to make these into a windshield heater.

Rather than use resistive, transparent, paint, it might be easier to find some sheet material that is resistive and transparent.

The tricky part is going to be cutting the sheet, or painting the paint, or taping thin wires, into a shape with electrical resistance well matched to the amount of power you want it to dissipate, at a voltage can be easily supplied by the car's electrical system.

I dunno. Maybe instead you could just mount a video camera on the roof, and drive via monitor when the weather gets frosty?

;-P

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mpilchfamily
mpilchfamily

5 years ago

The windshield shouldn't crack from defrost unless your waiting for the car to heat up before turning the defroster on. Should have the defroster on right away so the windshield can slowly heat as the car warms up. You must have had a small crack or chip in it already from something striking the windshield.

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verence
verence

5 years ago

You could have looked for a windscreen with built in defroster wires. Similar to the rear window but way finer. They exist for some brands of cars.

Paint something on yourself? No, forget about it. Apart from the fact that any police or vehicle inspection officer will go ballistic when seeing it, you will not be able to get the stripes even enough to get an even heating.

And then - you would just heat up the inside of the glass. Much the same as the hot air does.

So, just turn down the temperature of vents. If you have money to spent, invest in a block heater (good for the engine, too). If money is scarce, fill a hot water bottle and put it in the car on the dash board 15-30 minutes before you want to go.

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Downunder35m
Downunder35m

5 years ago

How exactly do you want to look through the windscreen if it is painted?

Also most countres have strict laws when it comes to windscreens and what you can put on them - usually only a thin trip on the top to block the sun out.

If you crack windscreens while defrosting you either do it wrong or have very cheap and bad windscreens.

Biggest mistake people make is to put on the heat to full and only on the windscreen while it is below minus 20° Celsius outside.

If the car heats up quick, like a diesel, the top of the windscreen is still freezing while the bottom is 40° warmer - recipe for damage...

Only the moisture inside the car and the air you breathe out will freeze on the windscreen, so until the inside of the car warms up it is good enough to have a cold or light warm blow on the windscreen.

And of course it helps not to drive with your nose on the windscreen because you can't see out of it.

If you talk about the outside defrosting, don't use warm water or hot air, just methylated spirit in a spray bottle...