Screen Printing is a printing technique that uses a woven mesh to support an ink-blocking stencil to receive a desired image. The stencil then forms open areas of mesh that transfer ink or other printable materials which can be pressed through the mesh as a sharp edged image onto a substrate. A fill blade or squeegee is moved across the screen stencil. This is forcing or pumping ink into the mesh openings for transfer by capillary action during the squeegee stroke. In short, screen printing is the process of using a stencil to apply ink onto another material. – Fort Collins