Folex diazo film is a special film. It can convert black and white patterns into transparent images. For resists, it has a very strong ability to accept ultraviolet rays and can be processed under general indoor light. Using polyester as the basic raw material, the structure is stable, and it is suitable for the processing of printed circuit boards.

Coating with diazo photosensitizer, based on transparent polyester film with excellent dimensional stability, Diazo Film for Printed Circuit Board PCB is an image transfer photographic film, applied in solder resist ink and dry film process in Printed Circuit Board.