A screen filter is a type of filter using a rigid or flexible screen to separate sand and other fine particles out of water. These are generally not recommended for filtering out organic matter such as algae. Typical screen materials include stainless steel, polypropylene, nylon and polyester.
In specialty coffee, the screen filter is used with some coffee preparation methods. Coffee passed through a screen filter will have a distinctive profile because it allows coffee oils to pass into the beverage. In contrast, paper filters retain most of the oils, producing a clear cup.