… is reliably read or interact with most Web sites. If I’d thought about it a bit, I’d’ve probably figured this out on my own, but mistermix spells it out: The resolution even on cheap newsprint is anywhere between 300 and 1,000 dots per inch. (At the paper, we told people submitting photos via e-mail to make sure they were at least 300 dpi.)
On a smartphone screen it’s less than 150. The letters have to be pretty big to show up at that resolution.