Tempering allows your Block Ice to warm up before use. Ice that hasn’t been tempered properly may crack when liquid touches it, giving the cube a flawed appearance. Tempering can also restore clarity to ice that has become frosty or freezer burnt, which can cause a cloudy appearance.
How to Temper Ice
You can temper your ice, letting it come to temperature, in a refrigerator, ice well, or open-air until it becomes clear and wet.
Your tempering times will vary depending on how much ice you are tempering and how cold the freezer was. However, plan for tempering to take roughly 5 minutes for a single cube. After just a few minutes, your ice will temper to crystal clear clarity.
DO NOT run your ice underwater to temper it. This can cause cracking.
Using Tempered Ice
Use your tempered ice within an hour or so, and serve it to customers or guests when it is clear. Tempered ice can be stored in an ice well, ice bucket, or refrigerator until it is used.