To gauge noise level, CR blends 1 cup of water and takes an average decibel reading over 30 seconds. Our durability test involves crushing seven ice cubes (four for personal blenders) without liquid for 1 minute on the highest setting. The convenience score is measured by how easy it is to use a blender’s controls, clean its base, and remove and replace the blade, among other factors. In our purée test, we blend veggies and other ingredients in boiling water, operating on the manufacturer’s recommended speed (or high) for 15 seconds-three times per model. (The lower the score, the bigger-and more irregular-the ice chips.) A Very Good rating tells you the ice is more like a snow cone. A blender that garners an Excellent rating in our ice-crushing test serves up ice that looks uniformly like snow. “When a blender earns an Excellent score in our icy-drinks tests, the drinks have a smooth, consistent texture,” says Larry Ciufo, a CR test engineer who runs our blender lab.įor our ice-crushing tests, we use another set of sieves to separate the big chips from the finer bits. In our lab, we make batches of nonalcoholic piña coladas and use a series of sieves (with increasingly smaller mesh sizes) to evaluate smoothness and thickness. CR tests blenders on how well they make icy drinks, crush ice, and purée, as well as on convenience, durability, and noise.
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