Tag: making clear ice cubes

  • The Clear Ice Maker That Already Exists

    So you know how I've been working for months on a way to make clear ice, and figured out that the best way (so far) to do it is with an Igloo cooler

    It turns out that someone else thought of that at least a couple of years ago. The Polar Ice Tray is basically a high-design cooler that separates the cloudy part of the ice from the clear part.

    Polar ice tray 3

    They accomplish this with an interior perforated bucket of sorts. The last part to freeze, the bottom, will have all the cloudy parts in it, and that is below the bucket.

    According to the instructions, you break off the cloudy part outside the bucket after it is frozen. 

    Polar ice tray1

     

    Pretty cool. More information is here.

    It looks like it works as well as my Igloo cooler method, and is just a bit smaller holding about 2.5 cups worth of ice. I've got more experiments to do though…

    An index of all of the ice experiments on Alcademics can be found here.

     

  • Using Salt Walter as an Insulator to Make Clear Ice

    This blog post is a continuation of this experiment.

    In this experiment, I wanted to test out another way to insulate an ice cube tray to make clear ice. Inspired by a comment from another blog entry by a reader named Gael, I decided to try salt water as an insulator rather than just plain water as in the last experiment. If it worked, this would be a way to make clear ice at home without taking up too much freezer space.

    I took a small food container and put it into a slightly larger one. The smaller container held only water. The outer container held water with table salt. The theory is that the salt water would not freeze, so it would act as an insulator for the ice, and control the direction of freezing so that it would only freeze from the top-down (as with the cooler method).

    Salt water bath_tn

    I didn't use a ton of salt. As you can see, the outer container's water did freeze lightly,though it was soft. The bottom did not completely freeze, as you can sort of see here.

    Outside of salt water bath_tn

    The inner container did seem to freeze toward the bottom.

    Salt water bath ice_tn

    In better-insulated containers, the cloudy part is only on the bottom of the container. Here, it is concentrated but raised slightly above the bottom of the container.

    In this case the inner container sat directly on the bottom of the outer container, so it wasn't greatly insulated on the bottom. My theory is that this is why the cloudy part of the ice is raised above the bottom.

    To improve this experiment, I would put raise the inner container off the bottom of the outer container, and probably use a greater amount of salt in the salt water. 

    As the outer container here is only slightly larger than the inner container, this system is more space-efficient than the Igloo cooler for many people without large freezers.

    There's more work to do on this…

    An index of all of the ice experiments on Alcademics can be found here.