Homebrew PCBs

I am working with ExpressPCB for almost 3 years and have not seen such a problem.
I print the files on a pdf format, open them in Photoshop and inverse the colours, as well and flipping them in horizontal direction. Save them again in pdf format and then take them to digital image setting and get the films and manually produce them on laminate sheet process.
Check if your settings on printing to a pdf file is correct. Maybe it is on an A4 format and you try to print them on legal or vice versa, or other settings that force the print to be done on a percentage basis.
 


      

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