HOWTO make crystal clear ice

Over at Instructables, Isr_Raviv posted a neat simple HOWTO, with video, on making crystal clear ice.
Link

[#1 posted by jim , October 12, 2007 2:02 PM]

Goes well with styrofoam cups. Suck it, Gaia!

[#2 posted by KurtMac , October 12, 2007 2:04 PM]

The Mythbusters could have used this when they tried to make an ice lens to magnify the sun to start a fire.

[#3 posted by flingbob , October 12, 2007 2:33 PM]

Very interesting, but also very wasteful of the natural gas or electricity required to boil a pot of water twice.

[#4 posted by r. holdstein , October 13, 2007 12:57 AM]

slow boingboing newsday?

here's the whole post in 5 seconds.

boil the water twice. wait that was more like THREE seconds. was a video really necessary?

someone wake me up when bboing has a post about shirt buttoning or shoe lace tying. i can't wait.

-holdstein

[#5 posted by dculberson , October 13, 2007 1:13 AM]

Shut up.

[#6 posted by Joffrey , October 13, 2007 5:25 AM]

OMG, it was like that? :-)

[#7 posted by Ape Lad , October 13, 2007 7:32 AM]

#5 may I interest you in a subscription to Esquire magazine? They once had an article about how to tuck in your shirt.
I tried this ice experiment last night and even used a brain shaped jello mold. It was still cloudy for some reason. I think I'll try distilled water next.

[#8 posted by mattyohe , October 13, 2007 12:26 PM]

I like how the author of this video has no clue what's actually going on.

"decomposes some of the minerals"?! Yikes.

[#9 posted by Jacques , October 13, 2007 4:29 PM]

Yeah, that was pretty funny bit about decomposing the minerals. Concentrate more like. I imagine that boiling the water once to remove any dissolved gases would be sufficient so the recipe is more like, boil some water, wait a bit, freeze. To take advantage of the Mpemba effect freeze water while still warm. Google it.

[#10 posted by Anonymous , December 8, 2008 8:59 AM]

Hot water takes longer to freeze. Thus harder and clearer ice. Zamboni's use hot water.