Photo silkscreens are produced by taking a high-contrast photograph and transferring the image onto silk fabric that is stretched over a frame. The silk is first coated with a light-sensitive solution. The photograph is projected onto the solution-covered silk, and the solution hardens where it is exposed to light. To produce a print, ink is pushed through the silk onto paper by using a squeegee. Any solution-hardened areas don’t let the ink pass through.Even though you don’t use silk and ink in Photoshop, you can create really interesting photo silkscreens by using the High Pass and Median filters applied to individual channels.