17 Feb
2025
17 Feb
'25
10:22 a.m.
There was one of those in the CAD system at Acorn when I joined in about
1990, though it was fairly quickly replaced by HP plotters and laser
printers (laser printers were the HP engine used in the LW4 but with our
own rasterizer in an ARM-based machine).
On Mon, Feb 17, 2025 at 5:35 PM Chuck Guzis via cctalk <
cctalk(a)classiccmp.org> wrote:
On 2/17/25 09:03, Jon Elson via cctalk wrote:
Teledeltos paper had a silver layer over a carbon
layer, and a spark
blew off the silver to expose the black carbon. (I think that's how it
worked, I haven't seen this stuff in decades!) It was used in early
machines for sending weather facsimile maps, for instance.
I think the stuff may still be available in single sheets for physics
demonstrations and perhaps for use in kymographs not using ink. I
checked up on availability perhaps 20 years ago, but not recently.
--Chuck