The note under the magnet only had two hours to live
GONE TO GET YOUR MUM. BACK BY SIX. A fridge note is the only kitchen document written to be read once, obeyed, and thrown away — which is why the red ink matters.

A torn scrap, held flat under a plain round magnet. GONE TO GET YOUR MUM. BACK BY SIX. Underneath, underlined: DO NOT TOUCH THE TOP SHELF — and NOT, specifically, in red.
Nobody expected this note to still be readable in a week. It was only ever meant to last until six.
What is a note like this actually for?
Getting one specific piece of information into one specific person's head before they open the fridge.
It isn't a record, and it isn't meant to be kept — it's an instruction with a deadline stapled to it, torn off whatever paper was nearest and stuck up at exactly the height someone reaches for the milk. Once BACK BY SIX has come and gone, the note has done its job, whether or not anybody remembers to take it down.
Why does a note like this only need to survive two hours?
Because that's the entire window in which the information is still useful.
GONE TO GET YOUR MUM answers "where is everyone", which stops mattering the moment everyone's back. A recipe card or a spice label is written to be read for years; this is written to be read once, by one person, sometime in the next two hours, and then it's just paper on a fridge. A timing plan taped up for a big meal is precise about the minute because a dozen people are eating at the end of it; this note is vague about everything except the one deadline that actually matters to whoever reads it.
Why does NOT get its own colour?
Because the person writing it didn't trust one line of black ink to stop somebody fast enough.
DO NOT TOUCH THE TOP SHELF is already underlined, which is one level of emphasis. Red on NOT is a second one, layered on top, and it's a small enough gesture that it was probably done in the two or three seconds it takes to swap pens — somebody standing at the counter with their keys already in hand, deciding the ordinary version of "don't" wasn't going to be forceful enough for whatever's up there.
Who owns the words on a note like this?
Nobody. GONE TO GET YOUR MUM and BACK BY SIX aren't anyone's property — they're the plainest sentences a kitchen produces, and there's no format here to license even if someone wanted to.
The only thing that makes this particular note worth printing is that it's this household's paper, in its own hand, warning about its own top shelf. A stranger's note would read the same and mean nothing.
Does this work for a note that isn't urgent?
Yes, though the urgency is what makes this one worth choosing over a calmer message.
A note that just says something ordinary — MILK'S IN THE DOOR, or BACK LATER — still works as the same short-lived, instructional object; it just won't carry the same charge as one written with a deadline and an underline in it. A shopping list scrawled on the back of an envelope is the other paper in a kitchen that gets written fast and discarded once its job's done, but it's a record of what happened rather than an instruction about what to do next.
Isn't a torn scrap under a magnet too slight a thing to print?
It's slight on purpose, and that's what makes it recognisable.
There's no design here — no border, no heading, just paper torn to whatever size was needed and held down by the nearest magnet, because nobody stops to find a proper notepad when they're already halfway out the door. That plainness is the whole likeness. A version tidied up onto a proper card would stop looking like a note anyone's family would actually leave.
Does it print well?
Yes, as long as the torn edge stays torn and the red stays confined to the one word doing the work.
A clean rectangle around the scrap would read as a printed card rather than paper somebody ripped off a pad, so the outline should follow the tear. Black for the main text, red held back for NOT alone, and a plain circle for the magnet — three marks, two inks, on white, which is close to what the actual object looks like stuck to a fridge.
How do I get one made?
Describe the note at JustOG — what it says, and which word needed the red. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.
Designs other people have published are in the shop.
Six o'clock came and went. The magnet's still holding the note up anyway.