Silkscreen [also known as Serigraph] prints:
Screenprinting, or Serigraphy, previously known as Silkscreening is a printmaking technique that traditionally creates a sharp-edged image using a stencil and a porous fabric. A screenprint or serigraph is an image created using this technique.
It began as an industrial technology, and was adopted by American graphic artists in the 1930s; the Pop Art movement of the 1960s further popularized the technique. Many of Andy Warhol's most famous works were created using the technique. It is currently popular both in fine arts and in commercial printing, where it is commonly used to put images on T-shirts, hats, ceramics, glass, polyethylene, polypropylene, paper, metals, and wood.
In electronics, the term screenprinting or screenprinting legend often refers to the writing on a printed circuit board. Screenprinting may also be used in the process of etching the copper wiring on the board or computer chips.
Graphic screenprinting is widely used today to create many mass or large batch produced graphics, such as posters or display stands. Full color prints can be created by printing in CMYK (Cyan, Magenta, Yellow and Black). Screenprinting is often preferred over other processes such as dye sublimation or inkjet printing because of its low cost and ability to print on many mediums.
Etching
Etching is a process in which an artist incises the lines of the desired image on to an acid-resistant layer of a metal plate. This metal plate is then placed in an acid bath, which cuts the incised lines into the plate. The artist then rolls ink over the plate, letting it seep into the crevices and wiping it off the flat, raised surface. The ink from within the etched lines creates the image when the artist presses a piece of paper to the metal.