08-03-2017, 07:23 PM
#1
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Guys - Help me out.  I've always wondered what the term "set in rubber" means when printed on vintage shaving brushes.  Does anyone know the meaning behind this?  And does this mean the handle itself is made of rubber?  Thanks!

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 08-03-2017, 07:39 PM
#2
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when i rework an old brush, I'm taking the knot out of a substance that looks like hard roofing tar.  I always supposed that was some sort of rubber.  So the rubber is the glue that holds the knot. At least that is my assessment.

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 08-04-2017, 06:34 AM
#3
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(08-03-2017, 07:39 PM)Lipripper60 Wrote: when i rework an old brush, I'm taking the knot out of a substance that looks like hard roofing tar.  I always supposed that was some sort of rubber.  So the rubber is the glue that holds the knot. At least that is my assessment.

I've read that pitch (or tar) was previously used in both making and setting knots. My understanding is that "set in rubber" referred to use of vulcanized (aka hardened rubber or ebonite) in brush-making. But there are also "rubber cements". See http://oldschoolshavingbrushes.com/pdf/u...407900.pdf.

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 08-04-2017, 06:58 AM
#4
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Very informative fellas, many thanks!

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 08-04-2017, 12:57 PM
#5
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In the olden days, hard rubber (Ebonite) was used to set knots into the handles. Nowadays we have high end 2-part epoxies for this task.

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 08-04-2017, 01:41 PM
#6
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Wow, I guess I asked the right question because I'm drawing responses from the revered kings of brushmaking! Thanks all for your responses - I bow down and commend your artisan skill and depth of knowledge!

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 08-04-2017, 02:44 PM
#7
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(08-04-2017, 01:41 PM)shaveser Wrote: Wow, I guess I asked the right question because I'm drawing responses from the revered kings of brushmaking!  Thanks all for your responses - I bow down and commend your artisan skill and depth of knowledge!

The patent I posted a link to is actually very interesting, even though it doesn't specifically speak to shaving brushes.

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 08-05-2017, 04:45 PM
#8
  • Crag
  • Senior Member
  • Menifee, Ca 92586
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According to my 95 yo dad, British brush makers used to use plain old Elmers type glue, which made the knots fall out after some time.

American brush makers started using Rubber Cement because it was more waterproof...

Sent from my SM-G935V using Tapatalk

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