A screen printing machine is a versatile device used to transfer designs onto surfaces such as fabric, paper, plastic, or metal. It works by pushing ink through a fine mesh screen that has been prepared with a stencil of the desired image. The areas blocked by the stencil prevent ink from passing through, allowing only the design to be printed accurately. This method is widely used in industries like textile printing, advertising, and packaging due to its durability and vibrant color output.