#Printer #tracking dots from multi-function colour printer ( #Ineo rebadged #KonicaMinolta, widely used in offices in UK and Europe)
I didn't even have to use UV torch, although I did have to fetch my polarised sunglasses from the car and wear them (maybe I even looked like a spy 🕵️ - as white LED light of the microscope shining on white paper was too strong to comfortably look at with bare eyes)
I did not find these on a delivery note I'd saved from a set of alloy wheels and tyres I purchased last year, which suggests that this was printed on a monochrome laser - popular in tyre garages nowadays having replaced dot matrix (which remained in use well into the late 2000s, a tyre garage is noisy anyway so the racket they make wasn't an issue)

