Regardless of saving an image in resolution 120 ppcm, it switches next time when opening to ppi
We have to print large scale wall prints. As there is a number of collaborators it was in the end decided to save pictures in the exact size as the wall, Because the measures are in mm, the size is in millimeters and we switched to ppcm instead of ppi, and the closest resolution to 300ppi would be 120ppcm, because we wanted to work with round numbers.
When we change it in photoshop and save PNG it all looks OK, however when we reopen PNG resolution is approx 305ppi as this is the equivalent to 120ppcm, but the size is no longer 1200mm, but 1199,21mm.
Because of the number of collaborators during the installation, and language barriers we dropped out all printing margins we would usually have when preparing for printing.
Is there a reason why Photoshop cannot keep the resolution and size? If everything is changed to decimal units there should be no such issue.
Thank you all in advance!
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