Passing dusting powders through sieve no 80 helps in obtaining finer powders. By doing so, any coarse particles or impurities present in the powder can be removed, resulting in a smoother and more uniform texture. The sieve acts as a filter, allowing only particles of a certain size to pass through, while larger particles are retained. This process of sieving helps in improving the quality and consistency of the dusting powder, making it more suitable for its intended purpose.
