HP82162A HP82143A Print Intensity

[Neve]

Hi all,

I recently acquired 2 HP thermal printers (a HP82162A and a HP82143A). I never had any of them printers, so when I got this opportunity I jumped on it. I rebuilt both power packs with Ni-Mh 1.2v/4300mAh, and they work perfectly.
More details are given about that in another thread, here.
Anyways, I noticed that the 82162A printing intensity is always a bit darker and more pronounced than with the 82143A using the exact same settings. No matter the settings.
Is that a problem with the 82143A or is it just the way these are? Not that it really matters, they both print extremely well and everything is very legible.

Just wondering...

Thanks