[xkeysc0re]

Hi, author here! The dots themselves aren't printed with UV ink it's just that the UV light makes it easier to see them due to the yellow ink used.

There were images I sent the magazine of the dots from some magazines I scanned, but they didn't run them. If you scan a page and invert it, the patterns are more legible https://i.imgur.com/x1TXa30.png

[joshspankit]

The dot patterns are much smaller and more dense than I expected

[TwoBit]

I don't understand what I'm looking at here.

[xkeysc0re]

You should see rows of tightly packed blue dots in repeating patterns - the machine identification codes for a Xerox printer, to be precise. You may have to turn off f.lux to see them