Do-it-yourself thermal paper

Hello,

I am thinking about buying a small mobile printer, but the smallest (500g/1lbs, €50) available is using thermal paper.
While I could find the paper rather cheap in the US (from about 6 cent/sheet) here I could not find anything similar.
I did stumble across
http://www.atarimagazines.com/v6n2/Inventions.html (" ... homemade thermal paper has a darker printout than any thermal paper you could buy. ... Be sure to clean your thermal head ... .") and
http://www.ehow.com/how_4685502_make-thermal-paper.html

Has anyone tried it or allready an old thermal printer to try?
Even if it will not be suitable for every day use, I am really interested in the subject :-)

schorhr (author) 8 years ago
I'dd try that too, we allways used milk; Same principle though, and the paper did not burn prior to the "secret" writing either ;-) The reason why this works is because the sugar burns first, so the sugar/glue mix should work too.
lemonie8 years ago
Er no. That sounds like bad news for a printer. If someone had produced pictures of this working I might give it some more thought, but sugar doesn't turn to carbon that easily, and if you're pumping that much heat into it paper alone will go dark.

L
schorhr (author)  lemonie8 years ago
I'll give it a try anyway. Sugar and carbohydrates from woodglue might do the job. Regular thermopaper does not turn black that easily either, else it would get grey/black even faster. As the thermotransfer is limited to very small areas, I doubt that the paper would burn prior to the sugar. Similar to toast: The outer layer gets dark, if you scrape it off, the toast is still white.
lemonie schorhr8 years ago
It sounds bad to me, either nothing or a clogged print-head. You really need to cook sugar to black. The usual "secret writing" trick is lemon-juice isn't it? I'd try that one first. L