[Serious] How long does the paper in a casascius stay legible?

[coin@coin]

Good question, as others have said, store them well and I'm sure they'll last a long time.

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[cpfreeplz]

Someone send me one of those 1000BTC coins and I'll watch until I can't read it anymore . Sound good? I guess I could try it with a 10BTC coin too... But that would be much less erm.. Scientific shall we say? I'm MUCH more curious about the 1000BTC coins

[TookDk]

I have a couple of redeemed Casascius coins, complete with peeled holo + paper with private key.
I have inspected the private keys with a magnifier, no signs of deterioration or any other damage at this point.

[digicoinuser]

Is there a consensus on which paper is the best to print a private key with?  

I noticed AT101ET mentioned "acid free paper" which may be better than the standard laser office paper.  I've made a couple DIY coins and wouldn't mind picking up some better paper for my laser printer for keys under holograms.

[buckrogers]

I did not see anyone here mention receipt paper, because I have had several receipts' ink fade away to nothing in less than 2 years. I dunno what ink is used, but the paper is pretty thin.

How many coins do you have with receipt paper that was used in them?

thanks!

[TookDk]

I did not see anyone here mention receipt paper, because I have had several receipts' ink fade away to nothing in less than 2 years. I dunno what ink is used, but the paper is pretty thin.

How many coins do you have with receipt paper that was used in them?

thanks!

Yeah.....

Pretty sure it was mentioned above, but receipt paper and the paper that is used by printers like the Piper Paper Wallet printer are different.

Yes, most retail receipts will fade quickly... more so, they really do not think you will keep them.
I always make a photocopy and save with original... not perfect but at least a copy for proof if needed more than 2-3 yrs down the road.

Most retail receipt are printed on thermal paper, the printer is an array of small heat emitters which the paper pass through, when thermal paper is subjected to heat then will it turn black. It is a commonly known that the print will not last much more than a year. Perfect for retail as it is cheap and reliable, and any warranty proff would be more or less gone after a year. Totally nogo for private keys.

[GMPoison]

I would imagine that if left untouched and out of direct sunlight the private key on the back would be legible for decades, no?

[coin@coin]

I would imagine that if left untouched and out of direct sunlight the private key on the back would be legible for decades, no?

I had the same impression but others on here may know more.

[GMPoison]

I would imagine that if left untouched and out of direct sunlight the private key on the back would be legible for decades, no?

I had the same impression but others on here may know more.

Has Mike himself made a statement on the subject? So far all that's been discussed on the topic has been hearsay, correct?

[monkeynuts]

Its an almost unanswerable question. We wont know how long they will last until they are no longer lasting ...

Need to understand paper and ink used by Mike, then draw parallels from the nearest equivalents

Interesting to know if the holos provide an air tight enclosure (and even if they block light)

Clearly having in an airtite or ANACS slab would assist, and keeping them in a slab case that blocks the light

I agree decades should be achievable, if not longer, given some old notes / maps ages

[aolley]

Not a direct answer to your question but I made a list of problems I had with other often-used cold storage methods: https://bitcointalk.org/index.php?topic=1634293.0


I would assume it will break down over time but keeping it sealed and out of light and heat should make it last a lot longer.