How to Make Crystal Clear Blocks of Ice
Intro: How to Make Crystal Clear Blocks of Ice
Do you want perfectly clear blocks of ice for use in an ice ball maker, or maybe just for fun? Follow these instructions and have great ice in any size you want. Only requires a few dollars worth of equipment:
Expanding insulating foam
A plastic container, such as a glass or pitcher
Plastic wrap and/or foil
Expanding insulating foam
A plastic container, such as a glass or pitcher
Plastic wrap and/or foil
16 Comments
jflottman 9 years ago
jflottman 9 years ago
fastrat2000 11 years ago
Just wild thought what would happen if the bottom was left uncover and the top gets a foam cap. My thought is if freeze from bottom up, the top not lock in so you could let it all freeze bigger block and you not have come get out at the right time, not sure if it would work, I not have the time to try it right now, but later I have try to make some clear ice.
Thanks for the posting.
Nanocephalic 11 years ago
- You spray expanding foam on the outside of the translucent plastic jug, then
- You put the clear plastic cup inside the expanding foam.
Are these two different configurations? Or did I miss a step regarding the two different containers? Do I put the small one inside the large one and fill the gap with foam?
spcutler 11 years ago
Whichever size you choose, you just need one, and to put the foam on the outside of that. Though if you really wanted to avoid getting foam schnibbles everywhere, you could use a nested approach.
More recently, I have make a unit with 4 cups in a square, with foam both between them and around the outside. I can thus make 4 blocks at a time. It just barely fits in my freezer.
kevinkliu 12 years ago
spcutler 12 years ago
kevinkliu 12 years ago
mjbird 12 years ago
spcutler 12 years ago
I did try using an ultrasonic jewelry cleaner to remove the remaining bubbles. It did in fact work well, but it's a bit tedious--right now, the process may be slow but at least it doesn't require too much human intervention. A vibrating massager thing would work well, I think.
kazmataz 12 years ago
spcutler 12 years ago
I would consider using something like this to start with:
http://www.amazon.com/Ice-Tubes-Llc-Cube-Tray/dp/B002DCCZA6
Then, just spray the foam insulation around the sides and bottom as usual. Make sure to wrap the whole thing in plastic wrap or the like so it stays removable--you'll need to run water on the backside to remove the ice. And again, you'll need to remove the tray from the freezer before it's finished. I'd guess that 8 hours is enough for typical-size cubes (about an inch long).
clevernonsense 12 years ago
Bluemini 12 years ago
Nice job!
rfakhre 12 years ago
spcutler 12 years ago
I tried simply using an insulated mug, but it didn't insulate as well as the foam, and it was impossible to get the ice out afterward! The foam shell is nice because you can slide the container out and then run the whole thing under water.
Let me know how your experiment turns out!