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Screen printing is a printing process that consists of pulling ink through a cloth screen.
Screen printing materials:
The screen consists of a piece of silk, nylon or polyester stretched taut over a wood or aluminum frame.
The mask is a piece of plastic or chemical filler on the screen that won't allow the ink to pass through parts of the screen.
The ink is usually a thick oil based ink.
The squeegee is a large piece of rubber with a handle that is the width of the screen.
In order to print, the screen must be covered by a mask. The ink is placed on the screen, and pulled evenly across by the squeegee. The ink is pushed through the fine mesh of the screen, but not through the mask, leaving an image on the surface below. The screen may be masked by a piece of plastic stencil, placed on top of the fabric. More commonly, however, the mask is created by a chemical filler that won't allow the ink to pass through. The filler may either be painted on by hand, or created with a light sensitive emulsion.