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Re: How do they paint the stripes on resistors, bumble bee caps, etc?

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On 09/09/2017 03:11, oldschool@tubes.com wrote:
> I've always wondered how they paint on the colored stripes. I put "how
> do they paint the stripes on resistors" on google, but all I got was
> links explaining how to READ color codes.
> 
> Has anyone ever heard anything about this process?

Resistors are made from a clay-like material containing carbon or other 
conductor in various amounts.  Colourants are added, and the material is 
rolled and layered into large 'pats', so for example a 4k7 resistor pat 
might have cream, yellow, cream, violet, cream, red, cream, gold, cream 
coloured layers.  This is rolled to the correct thickness corresponding 
to the final resistor length, then hollow punches form the resistor 
bodies, usually several thousand from one pat.  The better quality ones 
are rolled for smoothness and low noise.  The wire ends are fitted, the 
resistors are baked and often varnished.  For high accuracy resistors, 
the depth of one wire end is adjusted on test before the baking stage.

Cheers
-- 
Clive

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How do they paint the stripes on resistors, bumble bee caps, etc? oldschool@tubes.com - 2017-09-08 22:11 -0400
  Re: How do they paint the stripes on resistors, bumble bee caps, etc? Rheilly Phoull <rheilly@bigslong.com> - 2017-09-09 12:45 +0800
  Re: How do they paint the stripes on resistors, bumble bee caps, etc? Mike Coon <gravity@mjcoon.plus.com> - 2017-09-09 08:44 +0100
  Re: How do they paint the stripes on resistors, bumble bee caps, etc? "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-09-09 08:21 -0400
    Re: How do they paint the stripes on resistors, bumble bee caps, etc? Taxed and Spent <nospamplease@nonospam.com> - 2017-09-09 05:35 -0700
      Re: How do they paint the stripes on resistors, bumble bee caps, etc? Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2017-09-09 19:31 +0200
      Re: How do they paint the stripes on resistors, bumble bee caps, etc? "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-09-20 16:43 -0400
    Re: How do they paint the stripes on resistors, bumble bee caps, etc? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-09-09 13:08 -0400
    Re: How do they paint the stripes on resistors, bumble bee caps, etc? oldschool@tubes.com - 2017-09-09 14:14 -0400
      Re: How do they paint the stripes on resistors, bumble bee caps, etc? "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-09-20 16:53 -0400
      Re: How do they paint the stripes on resistors, bumble bee caps, etc? rickman <gnuarm@gmail.com> - 2017-10-19 13:04 -0400
  Re: How do they paint the stripes on resistors, bumble bee caps, etc? Jeff Liebermann <jeffl@cruzio.com> - 2017-09-09 09:07 -0700
  Re: How do they paint the stripes on resistors, bumble bee caps, etc? Roger Blake <rogblake@iname.invalid> - 2017-09-09 23:47 +0000
    Re: How do they paint the stripes on resistors, bumble bee caps, etc? Taxed and Spent <nospamplease@nonospam.com> - 2017-09-09 18:02 -0700
  Re: How do they paint the stripes on resistors, bumble bee caps, etc? Clive Arthur <cliveta@nowaytoday.co.uk> - 2018-01-03 16:11 +0000

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