51–60 of 69 posts
Just a friendly reminder that most common types of thermal paper contain BPA or BPS. You really should be avoiding these endocrine disruptors when possible. https://www.pca.state.mn.us/green-chemistry/bpa-thermal-pape...
Earlier quoted context omitted.
They've been noticeably degrading for a while already in fact, and are getting worse. https://i.imgur.com/Qmmqs3E.jpg
is it possible to prevent or reduce the degradation with a frame or some other protection?
Earlier quoted context omitted.
“Most common types of thermal paper contain BPA or BPS” That's not valid everywhere. The European Union decided in 2016 to forbid the use of BPA in thermal paper. [1] BPA is currently still used but will be completely banned in 2020. And, even if BPS will be allowed, EU surveys seem to show that alternatives to BPA/BPS are being considered for thermal paper. [1] https://echa.europa.eu/hot-topics/bisphenol-a
I mean, good for them, but if BPA is "still currently used" and alternatives to BPS are only "being considered", then in the EU both BPA and BPS are still in thermal paper right now , yes? So, in fact, it is valid to say that "most common types of thermal paper contain BPA and BPS."
Just a friendly reminder that most common types of thermal paper contain BPA or BPS. You really should be avoiding these endocrine disruptors when possible. https://www.pca.state.mn.us/green-chemistry/bpa-thermal-pape...
Why must every post on HN have a (surprisingly) high ranking post just crapping all over some aspect of a project?
If you really think I was shitting on the project, my apologies. I prefaced the sentence with "friendly reminder" as in "hey, perhaps this is something you should know about your materials, just like working with tritium".
And, at the end of the day, I didn't upvote myself this far. So ¯\_(ツ)_/¯.
(And for the record, the project is pretty neat).
I'm wondering could you sort of use thermal paper directly with a lens and a long enough exposure to directly create an image on thermal paper?
Earlier quoted context omitted.
Polaroid Originals were originally called 'The Impossible Project' and was a kickstarter campaign based around recreating the original Polaroid Instant film. It ended up being so successful, that they managed to acquire the brand name and IP of Polaroids Instant Camera technology. I'd link to a source, but it seems that https://www.impossible-project.com now just redirects to Polaroid Originals.
They didn't buy the IP for the chemistry for the original Polaroid film though, as Polaroid sold that to Fuji. That's why there's only 8 instead of 10 photos in a pack, because their chemistry required thicker photos, and the photos take about 30 minutes to self-develop, rather than 30 seconds of original Polaroids or Fuji Instax.
Makes for a much more in-depth and capable version of the Game Boy Camera + Printer: https://en.wikipedia.org/wiki/Game_Boy_Camera an object of gadget lust for me when I was growing up
I had the camera as a kid. Ben Heck did some interesting reverse engineering on the printer, and there's some stuff on Hackaday too if you're interested.
Also, for those unaware, people at Polaroid thought so, too, and released a thermal-printing color Polaroid SNAP a few years ago. It makes prints comparable to Fuji Instax, but the camera is digital and pocketable.
I've owned it for a couple of years, and I call it the friend-maker camera.
Just a friendly reminder that most common types of thermal paper contain BPA or BPS. You really should be avoiding these endocrine disruptors when possible. https://www.pca.state.mn.us/green-chemistry/bpa-thermal-pape...
Why must every post on HN have a (surprisingly) high ranking post just crapping all over some aspect of a project?
Just a friendly reminder that most common types of thermal paper contain BPA or BPS. You really should be avoiding these endocrine disruptors when possible. https://www.pca.state.mn.us/green-chemistry/bpa-thermal-pape...
“Most common types of thermal paper contain BPA or BPS” That's not valid everywhere. The European Union decided in 2016 to forbid the use of BPA in thermal paper. [1] BPA is currently still used but will be completely banned in 2020. And, even if BPS will be allowed, EU surveys seem to show that alternatives to BPA/BPS are being considered for thermal paper. [1] https://echa.europa.eu/hot-topics/bisphenol-a