this post was submitted on 17 Dec 2025
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What is this thing?

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The patch is small, about a fingernail in size.

Elsewhere on the packet they used two colors of ink: a very dark blue (this) and a lighter blue. I expected it to be some kind of alignment pattern, but only one of the inks seems to have been used here, so that's not it...

What is it for, why would they bother printing it? An ink+paper resolution/absorption test?

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[–] sramder@lemmy.world 35 points 1 day ago (2 children)

Maybe something for checking the calibration of the high speed cameras on their assembly line?

[–] Darkassassin07@lemmy.ca 15 points 1 day ago

I agree. This seems like some sort of calibration image. Whether for the printer, the cameras, or both.

[–] atomicbocks@sh.itjust.works 5 points 1 day ago (1 children)

My guess is the cameras use it to make sure the color plates are aligned properly. A lot of packaging printing still uses a 4 step printing with one plate for each color in CMYK.

[–] sramder@lemmy.world 2 points 1 day ago

Makes sense to me. Honestly can’t say I’ve seen that one before and I’ve seen a lot of printers marks… so I guessed at the high speed bit because that’s a bit newer than most of the stuff I’ve been trained on.

[–] Bosco@lemmy.ml 22 points 1 day ago (2 children)
[–] Iamsqueegee@sh.itjust.works 23 points 1 day ago (1 children)
[–] TachyonTele@piefed.social 13 points 1 day ago

A schooner IS a sailboat!

Now would somebody please get that damned kid away from the escalator!

[–] bhamlin@lemmy.world 1 points 1 day ago

Yup, came here to say stereogram

[–] Eheran@lemmy.world 8 points 1 day ago (1 children)

Can you provide some more context?

[–] NoSpotOfGround@lemmy.world 0 points 1 day ago

There's a description under the image. Starts with "the patch is small". I'm not sure if it's visible, because others are commenting as if they haven't seen it...

I'm not sure what else to add. Small paper packet of medicine, printed using two ink colors, only one used for this pattern. This is on one of the small underflaps at the end of the box.

[–] riskable@programming.dev 5 points 1 day ago

Probably an anti-counterfeit watermark.

[–] who@feddit.org 5 points 1 day ago (1 children)

It kind of resembles the patterns used on digital paper, but your description doesn't suggest that it would be used that way.

I don't recognize it as any common sort of matrix code (2D bar code).

Reminds me of cobblestones.

[–] NoSpotOfGround@lemmy.world 1 points 1 day ago

That's interesting! I hadn't heard of Anoto paper before... It can't be that, but interesting tech nonetheless.

It's a cheaper version of the security-patterns you'll find on the inside of quality mail envelopes - meant to keep snoops from being able to read what's inside. It's for your privacy ...

... or maybe it's just ineffective marketting meant to resemble such, or the absolute minimum/cheapest option to comply with medical privacy laws.

[–] prettybunnys@piefed.social 3 points 1 day ago

Might be for anti-counterfeiting purposes, just making a guess in the dark.

[–] Zathras@lemmy.zip 3 points 1 day ago (1 children)
[–] Wild_Mastic@lemmy.world 4 points 1 day ago

I'm sorry, that's not a magic eye pattern. Tried and there is no image.