Make crystal clear ice cubes

May 7, 2012 3:26 pm 0 comments

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We all know how to make ice cubes. We have the technology, as some might say.

But have you ever noticed, the standard of the ice cube one makes? Whether you’re a traditionally rigid mould user, or prefer a more flexible rubber ice cube tray for easy removal, the ice cubes you remove all share one characteristic  - they’re cloudy. Only now are you thinking of the perfect ice cubes you receive in top restaurants and bar… this is their secret.

There are guides out there that suggest using distilled water, or as pure as you can get it. This will indeed provide you with perfectly clear ice cubes. But the method below allows for crystal clear ice cubes, using two very basic ingredients:

  1. Tap water
  2. A kettle

Simple boil your pre-iced water, allow to cool (it’s not a good idea to put boiling water in your freezer), and use as per normal.

Voila! Crystal clear ice cubes. If they don’t look perfect on your first attempt, use a second boil of the water. Your tap water may have a high amount of dissolved gasses.

BEFORE:

AFTER:

 

The science: As the temperature of water increases, the solubility of gases decreases.  So if we have a lack of gas molecules left in our water, then light has little to no impurities to reflect off of, which is what gives ice its usual cloudy appearance.

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