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How To Make Infrared Cooling Paint (Electricity Free Air Conditioning)

NightHawkInLight4 HN recommenders · 2022–2025
1.2M views · tutorial · evergreen · Uploaded 2022-07-09

NightHawkInLight shows how to make ultra-white radiative paint that cools surfaces below ambient temperature without electricity. He walks through the research papers and the household-materials process.

HN points to it as a practical, well-researched DIY demonstration of passive radiative cooling.

Materials scienceChemistryPower grid, heating & buildings

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6 comments from Hacker News

@spyder2022 · in “Why rails buckle in Britain”

And for a better effect they could use paint that can cool below the ambient temperature by radiating infrared to space (if they aren't already using that, but it's probably more expensive): [LINK] Here is a YouTuber trying to making such paint: [VIDEO] Another article: [LINK]

CitesView on HN
@jcims2023 · in “Just How White Can White Paint Get?”

>Only active cooling can cool anything below the ambient temperature. Not exactly: [LINK] Couple of videos explaining the effect [VIDEO] [LINK]

CitesView on HN
@slimsag2023 · in “Energy-saving coating without pigment keeps the surface beneath cool”

Two YouTube researchers[0][1] (they make science content that is very much not in the traditional form of YouTube) have been working on Infrared Cooling Paint for almost a year now and have been detailing how individuals can make it at home (although a fairly involved/lengthy process today.) There's definitely something here, hopefully someone sells it pre-made, I'd love to try some. [0] [VIDEO] [1] [LINK]

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@teeray2023 · in “American universities have an incentive to seem extortionate”

This YouTuber[0] does an excellent job recreating chemistry research from papers and improving on the techniques to be accomplished with household materials. He documents his failures and takes an empirical approach to arriving at his successes. I’m not sure of his background, but it’s certainly research that he’s doing. Watching his channel always reminds me that the scientific method does not have “first obtain an expensive degree” as one of its steps. [0] [VIDEO]

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@energ82025 · in “NASA's Voyager Found a 30k-50k Kelvin "Wall" at the Edge of Solar System”

It's a thing in from thousands of years ago [LINK] and today [LINK] for PDRC there are a couple good videos about it from NightHawkInLight [VIDEO] , [LINK] and Tech Ingredients [LINK] [LINK]

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@jcims2025 · in “Mechanical power generation using Earth's ambient radiation”

DIY radiative cooling paint from YouTuber NightHawkInLight - [VIDEO] It has pretty impressive performance. Tech Ingredients did one or two vids as well - [LINK] Was thinking of whipping up a batch for my rv.

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