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submitted 1 year ago by L4s@lemmy.world to c/technology@lemmy.world

Ultra-white ceramic cools buildings with record-high 99.6% reflectivity::undefined

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[-] Treczoks@lemmy.world 34 points 1 year ago

Probably illegal here because of the high reflective value. Depending on the sun's position, it could dazzle and blind people, e.g. people driving cars or riding bikes. I know that for this reason, shiny metal roofs are not allowed.

[-] KapiteinPoffertje@lemmy.world 38 points 1 year ago

There is a difference between mirror like reflection and diffuse reflection. Mirror reflection is what you get with metal roofs which beam the sun directly to a target resulting in one spot being blinded. Diffuse reflection will spread it around, resulting in more light all around which is what we can handle as humans.

[-] Silentiea@lemm.ee 31 points 1 year ago

Can mostly handle. Snow blindness is a thing, and that's all diffuse reflection too, not specular. But it's unlikely a roof would be such a problem.

[-] intensely_human@lemm.ee 8 points 1 year ago

The reason for snow blindness is the fact the snow fills such a high portion of the visual field.

[-] Silentiea@lemm.ee 9 points 1 year ago

Yeah, hence it's unlikely a roof would fill it to the same extent and wouldn't be a problem.

[-] Pulptastic@midwest.social 2 points 1 year ago

We have snow here

[-] AstridWipenaugh@lemmy.world 19 points 1 year ago

It's not visibly reflective. Yes, it's white, but it's cool to the touch because the majority of the energy is radiated out into space via non-visible wavelengths. Someone has already posted a great YouTube video from Night Hawk In Light in a comment where he explains how this tech works and makes his own paint!

Yeah, it's good to read the article before commenting.

Here's a link to the Night Hawk video. Good stuff. https://invidious.fdn.fr/watch?v=KDRnEm-B3AI This guy just gives away a formula he developed for the pigment. OG shit.

[-] PsychedSy@sh.itjust.works 7 points 1 year ago

Him, Thought Emporium and Breaking Taps are in their own league of genius.

[-] ladicius@lemmy.world 2 points 1 year ago

I have aluminium foil covering my windows in summer and that doesn't blind anyone by far, even in full sunlight.

Not everything reflecting is a mirror.

this post was submitted on 14 Nov 2023
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