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Groups > comp.os.linux.misc > #89808

Re: Pot metal - was something else

From rbowman <bowman@montana.com>
Newsgroups comp.os.linux.misc, comp.sys.raspberry-pi
Subject Re: Pot metal - was something else
Date 2026-08-09 17:46 +0000
Message-ID <ndrso3Fmc5rU1@mid.individual.net> (permalink)
References (14 earlier) <11556i1$ru2o$1@dont-email.me> <nrCcnW5QlNCDBOv3nZ2dnZfqnPSdnZ2d@giganews.com> <er0jkmx15p.ln2@Telcontar.valinor> <2didncCUv6RGUOr3nZ2dnZfqn_GdnZ2d@giganews.com> <1159rak$29hv8$7@dont-email.me>

Cross-posted to 2 groups.

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On Sun, 9 Aug 2026 13:20:36 +0100, The Natural Philosopher wrote:

> Not all of them. Like steel, there is a huge range. There's many a radio
> case made of 'Bakelite' or stuff skinned with 'Formica'  or floored with
> 'linoleum'....still functioning
> 
> Epoxy and glass fibre PCBs dating from the 1970s are still OK, as are
> phenolic resin items

Thermosets are cross-linked and more stable than thermoplastics.

https://en.wikipedia.org/wiki/Thermosetting_polymer

The systems I worked with used thermosetting compounds, typically 
phenolic, expoxy, melamine, or furan.  The last was a stopgap measure. The 
oil embargo had a great impact on the petrochemical industry and material 
was difficult to source. Furan is based on furfural, typically produced 
from corncobs. Like most stopgaps it didn't have the strength of phenols 
or epoxies, The flow characteristics were different and moldmakers had to 
adapt. 

Thermoplastics are a different animal. I worked briefly for a company that 
made polystyrene foam disposable dinnerware. One advantage of 
thermoplastics is you can regrind your mistakes. The blowing agent was 
Freon-12 and the company bought it by the railway tank car. That's another 
'was' company on my resume, to say nothing of the CFC process.

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Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-04 00:53 -0400
  Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon gazelle@shell.xmission.com (Kenny McCormack) - 2026-08-04 06:19 +0000
  Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Andy Burns <usenet@andyburns.uk> - 2026-08-04 07:52 +0100
    Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-05 00:45 -0400
      Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Andy Burns <usenet@andyburns.uk> - 2026-08-05 09:22 +0100
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 12:08 +0100
      Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 12:04 +0100
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-05 13:56 +0000
          Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Andy Burns <usenet@andyburns.uk> - 2026-08-05 17:45 +0100
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 18:47 +0100
          Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 18:46 +0100
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "Carlos E. R." <robin_listas@es.invalid> - 2026-08-06 14:34 +0200
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 14:16 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "s|b" <me@privacy.invalid> - 2026-08-06 20:31 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 21:45 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon not@telling.you.invalid (Computer Nerd Kev) - 2026-08-07 08:45 +1000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "s|b" <me@privacy.invalid> - 2026-08-07 16:52 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 16:34 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon not@telling.you.invalid (Computer Nerd Kev) - 2026-08-08 08:47 +1000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-08-08 04:06 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-08 07:54 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-06 20:03 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 21:49 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-07 04:26 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 12:15 +0100
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon not@telling.you.invalid (Computer Nerd Kev) - 2026-08-06 08:59 +1000
          Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-06 02:25 -0400
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 12:55 +0100
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-06 20:10 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 22:02 +0100
          Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 12:53 +0100
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-06 20:13 +0000
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 22:08 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-07 03:52 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 12:12 +0100
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon not@telling.you.invalid (Computer Nerd Kev) - 2026-08-07 08:40 +1000
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "Carlos E.R." <robin_listas@es.invalid> - 2026-08-07 12:21 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 12:18 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon not@telling.you.invalid (Computer Nerd Kev) - 2026-08-08 09:27 +1000
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 12:02 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "Carlos E.R." <robin_listas@es.invalid> - 2026-08-07 18:55 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Robert Riches <spamtrap42@jacob21819.net> - 2026-08-07 17:13 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "Carlos E.R." <robin_listas@es.invalid> - 2026-08-07 19:32 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-08-07 19:16 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "Carlos E.R." <robin_listas@es.invalid> - 2026-08-07 22:04 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-07 19:24 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon [OT] "s|b" <me@privacy.invalid> - 2026-08-07 21:30 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 21:46 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon not@telling.you.invalid (Computer Nerd Kev) - 2026-08-08 09:39 +1000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-08 12:52 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-08 18:53 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-09 03:45 -0400
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-09 13:53 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-09 23:48 -0400
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-09 18:18 +0000
                [OT] Paywalling health services (was: Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon) Nuno Silva <nunojsilva@invalid.invalid> - 2026-08-08 10:59 +0100
                Re: [OT] Paywalling health services The Natural Philosopher <tnp@invalid.invalid> - 2026-08-08 13:02 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon not@telling.you.invalid (Computer Nerd Kev) - 2026-08-08 09:21 +1000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-08 12:43 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-08 18:42 +0000
  Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-04 07:00 +0000
    Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Andy Burns <usenet@andyburns.uk> - 2026-08-04 08:45 +0100
      Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-04 17:23 +0000
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Andy Burns <usenet@andyburns.uk> - 2026-08-04 18:43 +0100
          Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-05 02:18 -0400
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Andy Burns <usenet@andyburns.uk> - 2026-08-05 09:27 +0100
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 12:00 +0100
          Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 11:56 +0100
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-05 02:10 -0400
          Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Andy Burns <usenet@andyburns.uk> - 2026-08-05 09:29 +0100
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 12:18 +0100
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 11:49 +0100
    Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-05 00:47 -0400
      Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-05 06:03 +0000
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-05 03:34 -0400
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 12:17 +0100
      Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 12:10 +0100
  Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-04 11:24 +0100
    Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-04 17:30 +0000
      Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-05 02:14 -0400
      Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 11:51 +0100
  Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "s|b" <me@privacy.invalid> - 2026-08-04 15:04 +0200
    Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Andy Burns <usenet@andyburns.uk> - 2026-08-04 17:03 +0100
    Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-05 01:53 -0400
      Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "s|b" <me@privacy.invalid> - 2026-08-05 19:47 +0200
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 18:51 +0100
        Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 18:57 +0100
          Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "s|b" <me@privacy.invalid> - 2026-08-05 20:14 +0200
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-05 19:49 +0100
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "s|b" <me@privacy.invalid> - 2026-08-06 11:12 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 12:15 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-06 18:22 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 21:39 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-07 02:27 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 11:38 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Daniel James <daniel@me.invalid> - 2026-08-07 13:35 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 14:10 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Chris Green <cl@isbd.net> - 2026-08-07 15:02 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 16:32 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon wmartin <wwm@wwmartin.net> - 2026-08-07 11:01 -0700
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-08-07 19:16 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-07 21:37 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-07 19:35 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-07 22:48 -0400
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "Carlos E.R." <robin_listas@es.invalid> - 2026-08-08 09:01 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-08 12:24 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-08 20:47 -0400
                Pot metal - was something else The Natural Philosopher <tnp@invalid.invalid> - 2026-08-09 13:20 +0100
                Re: Pot metal - was something else "Carlos E.R." <robin_listas@es.invalid> - 2026-08-09 15:06 +0200
                Re: Pot metal - was something else The Natural Philosopher <tnp@invalid.invalid> - 2026-08-09 14:24 +0100
                Re: Pot metal - was something else c186282 <c186282@nnada.net> - 2026-08-09 22:48 -0400
                Re: Pot metal - was something else rbowman <bowman@montana.com> - 2026-08-09 17:46 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Daniel James <daniel@me.invalid> - 2026-08-08 13:37 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-08-08 17:31 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-08 18:44 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-06 23:37 -0400
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-07 18:14 +0000
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-05 22:03 +0000
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "s|b" <me@privacy.invalid> - 2026-08-06 11:03 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-06 18:32 +0000
            Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon c186282 <c186282@nnada.net> - 2026-08-06 02:22 -0400
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon "s|b" <me@privacy.invalid> - 2026-08-06 11:12 +0200
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 12:09 +0100
              Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 12:57 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon Theo <theom+news@chiark.greenend.org.uk> - 2026-08-06 14:14 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 14:18 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon wmartin <wwm@wwmartin.net> - 2026-08-06 09:55 -0700
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-06 18:48 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-06 18:42 +0000
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon The Natural Philosopher <tnp@invalid.invalid> - 2026-08-06 21:43 +0100
                Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon rbowman <bowman@montana.com> - 2026-08-07 02:26 +0000

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