30cmx1M PCB Dry Film Photosensitive Photoresist Sheets For Circuit Production

Description PCB photosensitive dry film for circuit productionAny light containing ultraviolet can be exposure and the wavelength of light is 370nm Size 30 x 100 cm 11 81 x 39 37 Color As pictures shownFeatures Photographic film also known as dry film is used to make PCB board stick it on top of the PCB it will become a sensitive circuit board Suitable for plating hole covering and the etching process Excellent ability to cover holes High Resolution Excellent adhesion to almost all surfaces Image clarity after exposure Front panel is very clean after developedHow to use it 1 Clean your board Cut dry film a little larger than your board 2 Apply Resist This Photoresist has 3 layers the top and bottom layers are clear protective layer so at the first you need remove one protective layer the easy way is to use two small pieces of tape Then apply the middle layer on board 3 Expose Place your negative artwork over the rest protective layer 4 Develop Remember you need NEGATIVE film developer Remove the rest protective layer on the film After 3 minutes take board out of developer and hold under running water to check you can always place it back in the developer if needs more time Etching The dry film is resistant to most of the acid etching solution the PH value can be resistant to most alkaline etching solution between PH8 0 8 5 Cover hole 1 5 mil dry film can fully cover a 0 25 inches thickness hole Plating The dry film is available in mos