PCB etching with photosensitive dry film – now working consistently. – The Society of Secretive Squirrels
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John Conover: DIY Negative Dry Etch PCB Fabrication
PCB Etching overview with Inkjet and Photoresist Dry Film (Part 1) | JES
Amazon.com: Photosensitive (30cmx500cm/1ftx16.5ft) PCB Photosensitive Dry Film for Circuit Production Photoresist Sheets, Replace Thermal Transfer PCB Board : Electronics