Old photographs that you'd like to turn into PCB ARTwork need to be scanned to create a digital image. Scanning them at 600 DPI yields good results for a 1:1 image (e.g., an original A4-size picture works well for A4-size PCB ARTwork) and acceptable results when scaling to a maximum factor of 4 times the original (e.g., an original A5-size picture yields acceptable results up to an A3-size PCB ARTwork).