This is a blank screen. It consists of a polyester mesh stretched on a wooden frame. It is very tough and there are about 130 threads per inch. Screens can be re-used with different artwork
many times.
This is some of the “positive” artwork used to make a stencil photographically. The screen is coated with light-sensitive emulsion. This is dried and the artwork is pressed against the screen with a sheet of glass. The screen is exposed to light for a few minutes, this hardens the exposed areas. The unexposed areas are washed away with water.
This shows a screen ready to be used for printing. The ink can flow though the lighter areas which are clear of emulsion.
The process is very flexible and is used on thousands of different materials
with special inks to suit each material.
The ink is forced through the clear areas on the screen by a rubber blade
called a squeegee. This can be held in the hand or operated automatically be a
machine.
This is a blank screen. It consists of a polyester mesh stretched on a wooden frame. It is very tough and there are about 130 threads per inch. Screens can be re-used with different artwork
many times.
This is some of the “positive” artwork used to make a stencil photographically. The screen is coated with light-sensitive emulsion. This is dried and the artwork is pressed against the screen with a sheet of glass. The screen is exposed to light for a few minutes, this hardens the exposed areas. The unexposed areas are washed away with water. 
This shows a screen ready to be used for printing. The ink can flow though the lighter areas which are clear of emulsion.
The process is very flexible and is used on thousands of different materials
with special inks to suit each material.