Most widey used method of printing onto fabric.
Fine mesh stretched over a wooden frame. The dye is moved over the mesh with a squeegee and forced through it onto the fabric to produce a pattern.
The pattern on the screen is blocked out with a paper stencil or chemicals.
A separate screen is needed for each colour in the pattern to be printed. Therefore a pattern with 10 colours would cost alot to produce as it would need 10 screens, one for each colour.