In article , Tony Cooper
wrote:

Like me, PeterN is trying to find out how it is possible for a printer
to swallow a raw file and spit out an image. My understanding is that
this is not possible. You seem to be supporting that view by extending
the argument to 'conversion'.

Both Lightroom and Photoshop will print a RAW file. I just tried both
using an Epson XP-410 (a low-end printer). LR just prints the RAW
file, but PS opens the RAW file in PS but it remains a RAW file.

Just for ****s and giggles, I tried to print a RAW (.dng) file using
FastStone image viewer. Prints fine.

What goes on between the software and the printer is unknown to me,
and it really doesn't interest me.

exactly.

I didn't notice any appreciable difference in how long it took to
print or the quality of the print.

there shouldn't be a noticeable difference in how long.

jpeg files are smaller so it may take slightly less time to read the
file but that's going to be a fraction of a second and will never be
noticed.