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dpflan
View an example here: https://ctan.math.utah.edu/ctan/tex-archive/graphics/pgf/con...

Maybe the hue is off, or its a different roast or beans, feels less coffee, more science murder mystery?

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spookie
Probably replicating when you scan the paper
robinsonb5
Maybe CMYK colour with no associated profile?
tantalor
Thanks for linking to that. Really confused why the ctan pages don't.
Tijdreiziger
They do, it’s the ‘English documentation’ link.
zeekaran
Aw, these don't look nearly as good as I hoped.
elevaet
> This page was intentionally left blank but we had to ruin it by letting you know.

Brilliant!

chanandler_bong 

              This page intentionally left blank.

  (Well, not completely blank, since the above non-empty disclaimer
  appears on the page.  What is meant is that this page is devoid
  of meaningful content related to the rest of the document.  This
  page serves only as a separator between sections, chapters, or
  other divisions of the document.  This page is not completely
  blank so that you know that nothing was unintentionally left out,
  or that the page is not blank because of an error in duplication,
  or that the page is not blank because of some other production
  problem.  If this page were really blank, you wouldn't be reading
  anything.  This page has not been left blank by accident, but is
  left non-blank on purpose.  The statement on the page should say

         "This page was intentionally left non-blank".)
http://www.tytempleton.com/rhf/jokes/93q1/nonblank.html
JohnFen
My favorite was with two sides of a blank page in a document. One side read "This page is intentionally left blank", and the other side read "This page isn't."
kqr
I always liked the self-contradictory nature of "This page was unintentionally left blank."
cwillu
Plot twist: the printer accidentally added the [non-]blank page.
huepfebein
Plot twist: the "blank page" hides internal information and a parting employee's rant against the boss in an official company publication and you only find out weeks later because of strange search engine results.

(No, definitely not triggered.)

micromacrofoot
yeah the color if off and you can see that it's obviously a vector graphic... it's kind of posterized
wayvey
I wonder if blurring the edges of the shapes within the stain might help make it look more organic
codetrotter
First few stains look a bit poopy. And last one a bit murdery. None of them look very covfefe.
fcoury
Agreed, I was expecting something a bit more like this:

https://geekhack.org/index.php?action=dlattach;topic=102580....

FirmwareBurner
What keyboard is that?
graphe
If you're looking for the game ending keyboard you need this one. https://www.aliexpress.com/i/3256803782645256.html

Any mechanical switch, on its own key mount moved on a split or single magnetic board. I suggest split.

FirmwareBurner
That looks amazeballs. What I wanted my whole life.

Is it good though or is it impulse buy ewaste that just looks cool?

graphe
It is very good. USB-C as well. Here's some English marketing https://www.velocifiretech.com/products/dumang-dk6-ergo-v2

The magnets are not weak and do not dislodge easily. I do not care about any keyboards unless it's better than this one. If anyone knows a better one let me know! I think they said they're working on a mouse or something like other input options a while ago, but I haven't heard of anything new but I haven't checked either.

FirmwareBurner
Thanks. Can you also tilt the halves like a tent for ergonomics?
graphe
I have them mounted to a chair I'm not by but I think so. Having a hot swappable keyboard I have them on the arms in a tilt specific to me. I was looking for an American clone but nobody makes anything this cool. https://dygma.com/pages/defy This one isn't magnetic but it's wireless and it has a mouse on it. I love the magnetic and the tactile feeling as well as the ability to mix and match keys and switches on the fly.

I'm not sure what the next iteration would be for a keyboard but I hope to see more ergonomic ones mounted on chairs.

entropicdrifter
That page says the software is Windows-only. Is the software just for the setup? Or would this be impossible to use on Linux/Mac even after configuring it?
bhasi
Have you used the Microsoft Sculpt Ergonomic keyboard? I really like that, but it isn't mechanical.
graphe
It's very nice, mechanical isn't always better. I really like the sculpt when I used it and if you're happy with it there isn't a big reason to switch.
chem83
Isn't stenography the end game?
graphe
I wanted to like plover because I thought so too, but there isn't anything stopping you from using this as a custom steno either.
MrGilbert
What's the name of the keyboard? I cannot visit this particular page, as the item is not shipped to Germany.
steve1977
That‘s the comment I expect on a site named Hacker News
Zircom
Could be literally any tenkeyless mechanical keyboard, hard to tell from whats in the picture.

I recommend a Keychron k8 as a good entry point if you like the format, been using it for a few years as my main one at home with a K6+little folding laptop stand for anytime I'm staying out of the house for any extended length of time.

k8 - https://www.amazon.com/dp/B08B5WHYTT/ k6 - https://www.amazon.com/dp/B07ZT7W5FP

for1nner
This is the kind of discourse I seek out on HN. ty
deleterofworlds
hard to judge on a screen how they will look printed
dessimus
Would you please print a copy and take a picture of the page laying on a wooden table and then copy/paste the result into a Word docx?

It's the only way to know for certain.

kqr
This seems like the sort of thing that happens when one repeatedly tweaks while using the previous iteration as a reference. It might feel like most iterations improve on what came before, but before long one loses the connection to the original reference.

I think Deming compared it to the telephone game.

graphe
The recent project of the darktable developer to ansel shows this happening in other open source projects too.
wly_cdgr
Stains need to be subtler/fainter, waterier, with grain specks
pavel_lishin
> A lot of time can be saved by printing stains directly on the page rather than adding them manually.

Outstanding.

cf100clunk
Bestowing the ''golden ring of quality'' has now been automated.
diego_sandoval
When a measure becomes a target, it ceases to be a good measure.
Something1234
Honestly if I got a resume featuring this I would immediately call them in for an interview it counts for massive bonus points.
dylan604
would you lower the points awarded if they were not to scale?
bluish29
Sometimes I exchange printed papers and documents with colleagues that have actual coffee stains. Would be interesting to have digital and physical stains at the same time. I will test that. Some will complain about the perfect shapes /s
dheera
Why aren't there mugs with hydrophobic coating on the bottom? It seems like this should be an easy problem to solve compared to all the petaflop GPU's and spacecraft we're building.
jhardy54
How would a hydrophobic coating help?
danbruc
I can imagine two ways. First, on the very bottom, if you place the mug into a puddle of coffee, then no coffee will wet the bottom of the mug. Second, around the side, when coffee runs down the side of the mug, a hydrophobic coating might stop a drop in its path if it is not too heavy. Not sure if the second thing would actually work.
netsharc
The coating around the side should form a V, with the handle being the lowest point, and make a little indentation on the bottom of the inside of handle to collect all the liquid...
0x38B
So make a GoreTex sleeve that waterproofs the bottom of your coffee mug?
DannyB2
Because that is a hardware fix.

Why fix in hardware what can be fixed in software? A simple Latex package could add hydrophobic coating feature to the document file.

Next: the device driver team will be tasked with a software patch to correct for the burned out light bulb on the device.

amlib
Oh great, one more ink cartridge for printer manufactures to sell. And, of course, the printer will refuse to work if your hydrophobic coating cartridges is empty even tough all other cartridges are fine.
zeekaran
Normally, mugs are ceramic and thus the parts that had to touch the shelf in the kiln are unglazed.

Maybe we just need to make pottery in 0G.

nolongerthere
Could you just suspend them on a cushion of air like indoor skydiving?
sho_hn
One of the primary motivations behind LK99 and other efforts to create room-temp superconductors is to fashion coffee mugs that harness the Meissner effect to levitate above journal print-outs.
samatman
Obtaining the necessary laminar flow in the presence of the handle might be challenging.
StableAlkyne
Huh, TIL

The bare ceramic on the bottom of the mug is of those things I've always noticed about coffee cups but never really thought about.

pbhjpbhj
Not all tableware is barefooted / dry-footed. You can use a stilt, which is a ceramic with sharp metal (eg Kanthal) pins on which the glazed ceramic is supported. Pieces fired this way have small marks on the bottom like the injection marks some moulded plastic has.

Fully glazed ware is good for wet areas when the ceramic may not be entirely vitrified, as this prevents water from soaking into the ceramic body.

Dry-footed ware that hasn't been high-fired will soak up moisture, eg when washing, and so cause problems - crazing, and getting very hot when used in a microwave oven (which can cause more crazing, but also burn your hand!

Source: am potter.

The foot ring on dry-footed mugs is a useful knife sharpener in a pinch.

eric__cartman
That's a very low tech solution. What we need is an internet connected mug that senses with a camera if it's about to be set on top of a piece of paper and starts beeping uncontrollably.

With a firmware update and an additional charge to the customer a model for detecting polished wooden furniture could also be used.

sho_hn
It also needs a permanent internet connection, as the inference for the paper detection is run in the cloud, and a subscription to keep it working.

I call it No-SaaS, No Stains as a Service.

bee_rider
Then how would we tell which papers have been read?
nosrepa
Aren't most hydrophobic coatings very toxic and wear easily?
simcop2387
They tend to get destroyed when cleaning the items. It happens a lot with clothing that has hydrophobic coatings so I'd imagine a dishwasher would ruin it almost immediately, leading to complaints and returns.
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leemelone
Think of all the work that was done on this package INSTEAD the paper the author should have been working on.
fghorow
I do hope they got tenure for this!

:D

BearOso
I'm sure the extra cost of color printing makes it less economical.
noelwelsh
Looking forward to using this next time I'm told I have to print, sign, and scan a document. I already have software setup to slightly rotate the page and add some grain, but this will add extra verisimilitude.
fuglede_
You and me both. Maybe someone will find this useful: https://photocopy.fuglede.dk/
mck-
Nice! If only I knew this existed last month.

But they also needed a “company seal stamp” which I had to draw

uhasker
I legit had to google the word "verisimilitude"
ebri
Me too. What a wordsmith, I am in awe! not being sarcastic, I really do appreciate it
ajot
Huh, it's not a common word in English, right? Spanish being my mother tongue, it's not weird for me.

What would be a more anglo word with a similar meaning, if any?

lucubratory
Verisimilitude is the right word, most people I know would know it if they were going to be reading anything about LaTeX. It might be a cultural or regional difference, I am in Australia.
SamBam
It's a perfectly good word, I didn't know it was unknown.
eclipticplane 

    convert \
        -density 150 \
        -colorspace gray \
        +noise Gaussian \
        -rotate 0.5 \
        -depth 2 \
        "$1" \
        "$(echo "$1" | rev | cut -f 2- -d '.' | rev)-scanned.pdf"
tuatoru
Now we just need a similar package to smudge and blot the signature slightly, and add a little ink spatter, for the fountain pen look.
flexagoon
And whenever you want to share a code snippet with someone, instead of using boring tools like Pastebin, use this instead:

https://code.xxut.ru/

sensanaty
Putting in a ruby snippet gives me a light-themed PyCharm with the filename being `scratch_1.txt`

Thanks, I hate it!

ar7hur
This is why I read HN every day.
sho_hn
Huh, my AI-generated newspaper also adds coffee stains to a LaTeX (technically LuaTeX) document: https://imgur.com/a/NoTr8XX

I cobbled this myself, I didn't know it was such an expansive domain with prior art!

hathawsh
Beautiful project! How long does the 1100 mAh battery last?
sho_hn
About 7 months in the first run. I recently switched things to a more efficient TPS63020-based voltage converter though, which has an extremely low operating quiescent current of only 25uA in low power mode (1/4 of the MT3608 I previously used). I'm hoping for more in the next!

The comparison will also be apples-to-oranges though since I also switched it to a 3500 mAh 18650 during that revision ... self-drain and therefore the battery make itself now become a big factor ... ask me in a few years how it went? :-)

engineer_22
Great project, would be a good expo for Hack-a-day
staplar
amazing! how much did all the components cost, minus chatgpt sub.
fifticon
I still cling to doing it manually, as a bonus you get coffee too!
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oorza
What goes through someone's mind that they spend all the time and effort to create a visual gag and then don't put images of said visual gag on the documentation?
CalChris
Maybe you can combine coffee stains and watermarks.
nvr219
Need to fork to make it bloodstains
Alifatisk
There is example of bloodstain at the bottom
0x38B
Stains add a whole layer of history to a document - I remember a prof at uni once apologizing for the wine stains on our papers...

In the same vein as stains, I love how non-waterproof inks react with water; the organic smudges and splotches add a bit of watercolor to an ordinary journal page (1).

1: https://nexus.armylane.com/files/Journal-Ink-splotches.jpg

pvaldes
Or use overpic and the coffee stain filter from Gimp.