Filtration - Solid-Liquid Filtering

The video explains the process of making fresh coffee, focusing on the role of filtration. It describes how coffee grounds are mixed with hot water, leading to a solution where flavor and color particles dissolve, but the grounds remain insoluble. Historically, coffee drinkers faced the issue of grounds in their drink until Melita Benz invented the paper coffee filter in the early 1900s. This invention allowed water to pass through while retaining the grounds, revolutionizing coffee preparation. The video concludes by emphasizing the significance of filtration in modern coffee making.

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