When producing artwork for making PCB's, some materials produce better results than others.
Overhead transparency sheets usually produce very poor results, as they cannot aggregate the ink or toner density enough to produce high contrast. Some materials are not UV transparent, and are also unsuitable for using as PCB artwork.
Using a suitable base media with an inkjet or laser printer, good results can be obtained.
Polyester artwork base is suitable for use in most inkjet and laser printers. It is capable higher resolution than paper. and is resistant to water. Polyester artwork base minimum resolution is 0.1mm lines with a 0.2mm gap between lines, subject to printer capability. It is recommended that exposure time is increased by 20~30%. Currently available in A4 size supplied in bags of 10 sheets.