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'Whitest ever' paint reflects 98% of sunlight

bbc.com

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Re: 'Whitest ever' paint reflects 98% of sunlight

#91

Post by tux1968 »

teh_klev wrote: post #85
space_ghost wrote: post #83

Earlier quoted context omitted.

Can I get in on that action? I don't understand why instrument cluster bezels are universally chromed but I hate it and my eyes hate it and I'd really like to look at my gauges without getting blinded.

Sadly, from their FAQ[0]: Q. Can I paint my car / bike etc... A. NO - 3.0 is quite fragile and will just scratch off, it won’t weather well. Q. Can I put a topcoat over it then? A. NO that will destroy the matte effect, and many topcoats (including our COAT) will react with the paint and ruin the finish. https://culturehustle.com/collections/black/products/black-3... (it's on the right hand side a few scrolls down th…

Should be okay inside the car though...

Re: 'Whitest ever' paint reflects 98% of sunlight

#93

Post by thinkingkong »

cyberlab wrote: post #4

Someone needs to compile a list of all this fringe tech that I see popping up in my feeds, almost daily now. I know there are techpress blogs that pump out articles like this, but there doesn't seem to be an authoritative compendium of such tech anywhere on the net. I could curate this by hand with 3 hours of free time and some Red Bull I suppose. The reason I want this is because we seem to be swimming in innovation…

What sources are you using for fringe tech that you would compile from? Even a list would go a long way to expanding mine and other peoples concepts of innovation.

Re: 'Whitest ever' paint reflects 98% of sunlight

#94

Post by icedistilled »

goda90 wrote: post #81

What we need is a paint that turns white when air temperature is high, and black when air temperature is low to reduce our heating and cooling needs.

"Darker materials also emit radiation more readily than light-colored materials, so they cool faster."

Re: 'Whitest ever' paint reflects 98% of sunlight

#95

Post by bwestergard »

Red_Leaves_Flyy wrote: post #88
cyberlab wrote: post #4

Someone needs to compile a list of all this fringe tech that I see popping up in my feeds, almost daily now. I know there are techpress blogs that pump out articles like this, but there doesn't seem to be an authoritative compendium of such tech anywhere on the net. I could curate this by hand with 3 hours of free time and some Red Bull I suppose. The reason I want this is because we seem to be swimming in innovation…

I think part of they problem is that whoever invented this paint is going to want a massive premium for its sale. So it'll get some niche industry use until the patent expires and people start painting their desert roofs with it, or whatever else. Apply to this virtually every technical innovation that is iterative. Fundamental breakthroughs allow for a shakeup of the incumbents, iterative ones don't, due to the arch…

This is a very insightful comment. Perhaps you are aware, but some economists have designed mechanisms to "split the difference" in a manner similar to what you describe:

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2744810

Re: 'Whitest ever' paint reflects 98% of sunlight

#96

Post by blacksqr »

kube-system wrote: post #66
malloryerik wrote: post #62

Earlier quoted context omitted.

Your point clearly has merit in many cases, but paint seems almost the epitome of practicality. Assuming that it could be mass producible at a price similar to premium house paints I can't see the problem in bringing this to market. And from the article: > In the US, New York has recently coated more than 10 million sq ft of rooftops white. The state of California has already updated building codes to promote cool ro…

There are a lot of practicality/implementation concerns to paint other than what color it is. Just as many if not more than there are for battery technologies. Does the paint stick to the surface you want to paint, how is it applied, what is the coverage, is it durable, does it repel contaminants, can it withstand the environmental conditions, is it chemically compatible with the surface, it is chemically a concern f…

They used standard acrylic paint manufacture techniques, just substituting barium sulfate for the usually-used white pigment titanium dioxide. So most such questions should be answered simply by looking at previous experience with existing white acrylic paint.

Re: 'Whitest ever' paint reflects 98% of sunlight

#97

Post by FredPret »

quickthrowman wrote: post #64
FredPret wrote: post #45

Earlier quoted context omitted.

Speaking of joining the dots, did you know that both the train and steam power (albeit a toy version of it) were invented in ancient Egypt? Think what could have been had we joined those two dots in 2000BC instead of 17-1800 AD. I should note that their train was of course pulled by slaves and not a locomotive.

You need machine tools capable of tight tolerances and quality metals/alloys to make useable (for work) steam engines. The Egyptians, Greeks, Romans, Abbasid, Persians, Europeans, etc all lacked these, thus no usable steam engines in antiquity/Middle Ages. Usable engines followed consistent quality metal production and machine tools pretty closely, it’s not like older people were just stupid, they didn’t have the tec…

Good point regarding tooling, metal, and tolerances.

But in this hypothetical timeline they would’ve hand-made the first leaky and inefficient engine if someone with some clout had the idea for a piston back then.

These people didn’t blink at moving mountains to build burial crypts, so it’s conceivable that they might’ve experimented with steam if that notion struck, say, the pharaoh.

Re: 'Whitest ever' paint reflects 98% of sunlight

#99

Post by Tempest1981 »

kube-system wrote: post #66
malloryerik wrote: post #62

Earlier quoted context omitted.

Your point clearly has merit in many cases, but paint seems almost the epitome of practicality. Assuming that it could be mass producible at a price similar to premium house paints I can't see the problem in bringing this to market. And from the article: > In the US, New York has recently coated more than 10 million sq ft of rooftops white. The state of California has already updated building codes to promote cool ro…

There are a lot of practicality/implementation concerns to paint other than what color it is. Just as many if not more than there are for battery technologies. Does the paint stick to the surface you want to paint, how is it applied, what is the coverage, is it durable, does it repel contaminants, can it withstand the environmental conditions, is it chemically compatible with the surface, it is chemically a concern f…

Other factors include how it ages, w.r.t. thermal emittance (emissivity) and solar reflectance (SRI). See the "3 years" columns here: https://coolroofs.org/directory

Many products drop by several % after a few years.

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