Photolith film
![A photolitah film as used in PCB-s contact copiers.](/Images/godic/202502/02/Navrh_plosny_spoj_vyroba0559.png")
A photolith film is a transparent film, made with some sort of tranparent plastic (formerly made of acetate). Nowadays, with the use of laser printers and computers, the photolith film can be based on polyester, vegetable paper or laser film paper. It is mainly used in all photolithography processes.