The brands were tested for their performance on these tasks: grinding coffee, whisking egg whites, making idli batter, grinding rice and juice extraction.
a) Grinding coffee: As per IS, the recommended quantity of roasted coffee beans is taken for grinding and filtered in the three sieves of different microns. The material retained on each of the first two sieves shall not be more than 20 per cent of the weight obtained at the end of the test. The material passing through the third sieve shall not be less than 30 per cent of the same weight.
b) Whisking egg whites: In this test, the material shall remain in the bowl when inverted for five seconds.
c) Making idli batter: This test indicates uniform performance in making a batter of rice and black gram. This requires grinding and mixing of the material in water to make a uniform, smooth and homogeneous