On Sun, Oct 31, 2021 at 11:40 PM Fred Cisin via cctalk
<cctalk@classiccmp.org> wrote:

> The THERMAL paper that I used for the Silent 700s was "white" and very
> slowly changing to yellow or brown.  Didn't hold up very well to heat
> and/or sunlight.

Another thing that ruins thermal printouts is propan-2-ol (isopropyl
alcohol). It turn the paper black as if it has been heated.

Since I normally have a can of said solvent on my bench for cleaning
disk drive heads, connectors, etc, I have to be careful if there's a
thermal printer about.

-tony

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