Screen printing is done using a screen which filters the ink into the areas that are meant to be printed upon. Non-permeable material is used to create a stencil which is the negative of the intended image. The ink then seeps only into the areas without the permeable material, therefore creating a controlled outcome.
This is the most common of all t shirt printing types and is easily the choice if you plan on mass producing printed t-shirts or screen printed hoodies, for example. This is because the stencils can be used over and over again, making it perfect for repeated productions.