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A comment on "We have a thermal printer hooked up to the internet, you can send us a doodle". Parent comment

Re:"We have a thermal printer hooked up to the internet, you... by user3939382 on Thursday October 19, 2023 @08:09AM (#37941754)
Yes although any thermal printing I've ever done creates a print out that fades over time, so probably a horrible solution for backup codes.
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Re:"We have a thermal printer hooked up to the internet, you... by rodlette on Thursday October 19, 2023 @08:10AM (#37941766)
Good point. Thanks!
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Re:"We have a thermal printer hooked up to the internet, you... by jimnotgym on Thursday October 19, 2023 @08:34AM (#37941978)
You can get small inkjets too...
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Re:"We have a thermal printer hooked up to the internet, you... by diggan on Thursday October 19, 2023 @08:46AM (#37942131)
Would that happen even if you laminate it + stick it in a dark place?
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Re:"We have a thermal printer hooked up to the internet, you... by szszrk on Thursday October 19, 2023 @08:59AM (#37942281)
In my experience yes. Old receipt roles fade even stored in a warehouse. I would try that anyway, as an experiment.

A cheap thermal printer for kids is around 10-20 USD (got one for such price with 10 rolls of paper, half of which is sticky paper), has bluetooth, usb and battery. Fits in a pocket. Would be fun to stick such qr code inside some not important book left lying around.

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Re:"We have a thermal printer hooked up to the internet, you... by Sabinus on Friday October 20, 2023 @12:29AM (#37952403)
I would caution about giving children receipt paper. It may contain a lot of BPA (or replacements).

https://www.smh.com.au/business/consumer-affairs/controversi...

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Re:"We have a thermal printer hooked up to the internet, you... by Chingers on Thursday October 19, 2023 @08:51AM (#37942172)
The laminating process would probably blacken the entire paper
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Re:"We have a thermal printer hooked up to the internet, you... by calabin on Thursday October 19, 2023 @08:58AM (#37942262)
Yes I found this out the hard way just last week - thought I was being pretty clever with my inside-the-box packing label.
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Re:"We have a thermal printer hooked up to the internet, you... by diggan on Thursday October 19, 2023 @08:58AM (#37942253)
There are laminators that don't use heat ;)
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Re:"We have a thermal printer hooked up to the internet, you... by m_eiman on Thursday October 19, 2023 @09:20AM (#37942504)
There are variants that claim to be long-lived, but they're in a tiny minority.

Edit: I seem to be misremembering; direct thermal transfer printers aren't available with long life prints, only thermal transfer printers are.

https://www.zebra.com/us/en/resource-library/faq/difference-...

Which is also thermal printing, but not the kind used here.

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