Antique 4x5 camera creates 20 micron photolithography masks: Super tiny tax form

I use an antique 4x5 view camera to create high resolution photomasks in my home shop.

Source of film and developing chemicals: https://www.freestylephoto.biz/531345-Arista-Ortho-Litho-Film-3.0-3.9x4.9-50-Sheets-For-4x5-Film-Holders
Possible source of poster-sized printouts: https://blueprintsprinting.com/pricing/
Gold on microscope slide: https://sci-hub.tw/10.1109/MEMSYS.2013.6474404
Commerical microelectrode arrays: https://www.multichannelsystems.com/products/microelectrode-arrays
Vacuum film holder: https://web.archive.org/web/20111016132122/http://cloudynights.com/documents/large.pdf
Test patterns: http://www.bealecorner.org/red/test-patterns/
Thought emporium: https://www.youtube.com/user/TheChemlife
Huygens Optics: https://www.youtube.com/user/huygensoptics
Sam Zeloof: https://www.youtube.com/user/szeloof

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