A screen filter is a type of filter using a rigid or flexible screen to separate sand and other fine particles out of water. 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.
Many times screen filters are built with meshes. A mesh consists of a semi-permeable barrier made of connected strands of metal, fiber, plastic or other flexible/ductile material. Mesh is similar to web or net in that it has many attached or woven strands.
The best example of a filtering screen is a French press.