I made this thing, appreciate the attention and kind words, to answer some questions/concerns:<p>- Paper is BPA free, got it from here <a href="https://www.amazon.de/dp/B0932QVYBQ" rel="nofollow">https://www.amazon.de/dp/B0932QVYBQ</a><p>- Photos do have a lifetime, although no idea how long, the ones I have for a while seem to do better than the average store receipt<p>- It's not really _poor man's_ polaroid, but as someone else mentioned, price difference is not that big, while a single photo is a LOT cheaper<p>And there's a permalink for english language, in case OP or someone else can update it - <a href="https://boxart.lt/en/blog/poor_mans_polaroid" rel="nofollow">https://boxart.lt/en/blog/poor_mans_polaroid</a>
> Paper is BPA free, got it from here<p>For those as paranoid as myself:<p>Common BPA substitutes, often used in "BPA-free" products, include Bisphenol S (BPS), Bisphenol F (BPF), Bisphenol AF (BPAF), and Bisphenol Z (BPZ). While marketed as safer alternatives, these analogs often share similar endocrine-disrupting properties and structural similarities to BPA, raising concerns about "regrettable substitution".<p>I don’t let my kids come in contact with anything “BPA Free” and we avoid plastics as much as possible.
Do thermal prints still use materials that are endocrine disruptors, I don't know. But something to consider. <a href="https://www.eea.europa.eu/en/analysis/publications/human-exposure-to-bisphenol-a" rel="nofollow">https://www.eea.europa.eu/en/analysis/publications/human-exp...</a>
It's been regulated since 2020 in Europe at least.<p>> As part of the EU’s REACH Regulation Annex XVII, a restriction banning Bisphenol A (BPA) content in thermal paper above 0.02% by weight came into effect on January 2, 2020. This prohibition was implemented due to health concerns associated with BPA exposure<p>bpa free thermal paper is pretty easy to source from anywhere now because of this.
From my understanding, BPA was just replaced either a similar chemicals <a href="https://www.sciencedirect.com/science/article/pii/S2590182625000372" rel="nofollow">https://www.sciencedirect.com/science/article/pii/S259018262...</a><p>If the law calls out BPA exclusively and not a more general description, it’s just a false sense of safety.
This brand claims to be fully recyclable:<p><a href="https://www.koehlerpaper.com/en/products/Thermal-paper/TH_Blue4est_POS_cash-register-rolls.php" rel="nofollow">https://www.koehlerpaper.com/en/products/Thermal-paper/TH_Bl...</a><p>It supposedly works by using a layer of reflective bubbles that collapses when exposed to heat:<p><a href="https://www.youtube.com/watch?v=pc1mlCThevg&t=20s" rel="nofollow">https://www.youtube.com/watch?v=pc1mlCThevg&t=20s</a><p>Of course, I don't know how those bubbles are made or how they are made to collapse from heat, so for all I know that layer still uses chemicals that currently slip through regulations. But I can also imagine that it is doable to create such a "functional layer" with safe materials.
Here seems to be some examples of printed images on Blue4est paper[1].<p>[1]: <a href="https://thermalprintcameras.wordpress.com/blue4est-paper/" rel="nofollow">https://thermalprintcameras.wordpress.com/blue4est-paper/</a>
One shop network used blue paper here but changed to white some time ago.<p>Contrast was not great but I guess the price was the reason for the change.
Yeah I was excited about such a project concept until I saw it was thermal printer. Would love a little Polaroid type camera with inexpensive film for my kids to play with, but I don’t want them playing with thermal paper, kids put literally everything in their mouths.
(1) So many people have told me they thought Polaroid film was crazy expensive<p>(2) There are the BPA concerns other people talk about but thermal prints don't age well at all. I made some prints of Pokemon characters about 5 years ago like this one<p><a href="https://safebooru.org/index.php?page=post&s=view&id=1821741" rel="nofollow">https://safebooru.org/index.php?page=post&s=view&id=1821741</a><p>and these are barely legible now. (Pokemon sample art is designed on the assumption that their art is going to be viewed on horrible screens, I'm going to argue that Lusamine respects Ansel Adams' "Zone Theory" really well which makes it work great as a thermal print)
Nice project!<p>But this is definitely NOT for a poor man. Poor people buy a $20 camera on Amazon.<p>A time-rich person can afford this camera.
Note that this is an existing product category, usually cheap too.<p>Lots of examples here: <a href="https://thermalprintcameras.wordpress.com" rel="nofollow">https://thermalprintcameras.wordpress.com</a><p>Of course one can still want to hack something like this yourself for fun or other reasons.
If you're using mobile, there's an "English" button in the menu.<p>Note to website owner - it could be nice to have a permalink to the English version.
The English seems to be "cleaned up" compared to the English translation.<p>"I forgot to take a photo before I started humping one of printers"
Hey, I enjoyed reading about the spausdintuvu and power banko.
Funny, it's not two days that I've published what I called 'we have Polaroid at home' <a href="https://www.printables.com/model/1622259-14mm-label-tape-picture-stand" rel="nofollow">https://www.printables.com/model/1622259-14mm-label-tape-pic...</a><p>Note it's just a 3D printable stand for tiny printer labels (16mm wide). It was a literal 5 minute project but I liked the retro and restrictive aesthetic enough to share..<p>Such printer as shown is an absolute bargain at £15
Sveikinimai lietuviskam projektui HN pirmam puslapy ;) dziugu geras projektas
Ačiū, gerbiamieji:)
Retas LT W :D
Looking at all ready-made options on Amazon and elsewhere - anyone who will roll out an <i>adult-oriented</i> well-made single-button camera that takes in standard thermal paper rolls will make a fortune. This is such a great thing to have for get-togethers and parties. But it's essential to not being bound by $X/shot proprietary cartridges and be able to shoot and snap without thinking. Mementos for everyone!<p>* ... without thinking <i>of costs involved</i>. $2 per polaroid with half of them not even developing properly is a bit too high for spontaneous photography urges.
This is a really inspiring project and exactly the type of content I'm looking for on Hacker News.<p>A bit surprising that so many people in the comments would rather see links to cheap temu polaroid knockoffs.
Fun project. But if you just want the end result, you can buy one of these thermopaper toy cameras on Amazon for like $20.
I bought such a thing for my daughter and it's great fun but this old codger will never cease to be amazed at how much tech is available for such a small amount of money - the digital camera functions normally, takes video too, the system has basic games and a vivid LCD screen and there's a thermal printer - all in a cute moulded package. £25 ours cost.
One of my kids just got a $13 “smart watch” which has a touch screen, camera with filters/editor, microSD storage, plays MP3s, records voice memos, has games, and more I’m probably forgetting.<p>It absolutely blows my mind how cheap tech is these days.
Reminds me a lot of <a href="https://mitxela.com/projects/thermal_paper_polaroid" rel="nofollow">https://mitxela.com/projects/thermal_paper_polaroid</a>
Obligatory "be careful with that poisonous paper" warning[1]<p>[1]: <a href="https://hn.algolia.com/?dateRange=all&page=0&prefix=false&query=thermal%20paper%20bpa&sort=byDate&type=comment" rel="nofollow">https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...</a>
One should know that thermopaper contains Bisphenol A aka BPA.
Unless you're in Europe.<p>> As part of the EU’s REACH Regulation Annex XVII, a restriction banning Bisphenol A (BPA) content in thermal paper above 0.02% by weight came into effect on January 2, 2020. This prohibition was implemented due to health concerns associated with BPA exposure<p>so unless you're buying old rolls, or from non reputable sources, it shouldn't be an issue in the EU at least.
I’m fairly certain that a large percentage of people who buy thermal printer for fun do so from China, which has no regulations on thermal paper.
I thought that it was just replaced with similar molecules such as BPS, which has been shown to have equally bad effects.
You can buy phenol-free thermopaper if you are concerned
Is it free of all phenols or just free of Bisphenol A? I ask because there are very similar Bisphenols (S and F) that are at least suspected of being just as bad as BPA and they are not banned or limited by REACH Annex XVII.
Is there a way to actually verify that? I still don't trust that just because it says it on the label.
this is a great idea and wonderful execution, inspiring others(me) to build one!
Too bad the thermal prints may not last very long.
This is already available on online shops.
There are actually cheap pocketable good quality bluetooth photo printers one can buy.