PNG size not the same as the PSD file

Question

So, the company that I work for does printing on garments and other products. I know the correct measurements for saving the .psd files for print which are: Preserve Details 2.0 at 14 x 16 in at 300 dpi. However, when I save them as a .png, the file is super big for some reason with a 72 dpi. Is there a way to get it to stay at the 14 x 16 in measurements (300 dpi). It wouldn't be that big of a deal if the printer didn't have to resize it everytime. So, is there a way to keep the file like it is supposed to be at 14 x 16 in (300 dpi).

D Fosse · Accepted Answer

It sounds like you're using Export or Save For Web.

Both will strip the resolution metadata altogether. The file out of Export doesn't have a ppi at all, not 72, not 300. But when you reopen into Photoshop, some ppi number is required for other reasons. But any number will do; so PS just assigns 72 as default.

In Image Size, uncheck! resample, and type in 300 instead of 72. Then it will return to what you expect.

Nothing in the file has changed during this. The file itself is just pixels. The ppi number is just an instruction for pixel density, and thereby final printed size.