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Do It Yourself (DIY) Making and repairing of instruments, accessories, and more.

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Old 05-01-2019, 07:49 AM   #1
Pip01
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Default Recoloring a Delrin/Poly Chanter (??)





Greetings to All,

I have an old (70s) Delrin/poly chanter that was (most
probably) left out in the sun for much too long... and is
therefore... not of its original all-black hue.

Now, it isn't of the first ones (War-Mac?) that were just
mottled. This one is simply unevenly blotched on one
side... and I would like to change it back to its original
color. (It sounds really nice, and I don't want to lose it.)

I tried a small experiment with an industrial black magic
marker... but that's a no-go... due to the purplish sheen
that results... (Sigh...)

Short of just painting the damned thing black... which I
would greatly prefer not to do... any ideas (or experience :)
out there about how... this might be best accomplished?

All thoughts... ideas... and suggestions... greatly appreciated!!

Regards to All,

Pip01










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Last edited by Pip01; 05-01-2019 at 07:52 AM.
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Old 05-01-2019, 08:12 AM   #2
el gaitero
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Default Re: Recoloring a Delrin/Poly Chanter (??)

Hopefully without starting a whole side discussion about ‘ to oil..or not..’ you might try spreading some e.g. bore oil on the outside...or nose oil ,or mineral oil,....see if it darkens the plastic uniformly.
The paint scheme doesn’t sound so far fetched ...prep the the surface with a light rub of 400 grit wet/dri paper...then a thin spritz of proper primer and finish paint for plastic. ( krylon, etc...flat or semi ) .no one will know.
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Old 05-01-2019, 08:04 PM   #3
zarb
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Default Re: Recoloring a Delrin/Poly Chanter (??)

A cursory Google search shows that the Knife guys occasionally dye Delrin using RIT dye. Probably worth an experiment, as it wouldn't change the dimensions of the chanter, would be inexpensive and "might" work. Probably make a PVC pipe "tank" and submerge the thing in a concentrated solution and leave it for a while. Hands will be black after initial clean up I would think.
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Old 05-01-2019, 08:06 PM   #4
zarb
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Default Re: Recoloring a Delrin/Poly Chanter (??)

A cursory Google search shows that the Knife guys occasionally dye Delrin using RIT dye. Probably worth an experiment, as it wouldn't change the dimensions of the chanter, would be inexpensive and "might" work. Probably make a PVC pipe "tank" and submerge the thing in a concentrated solution and leave it for a while. Hands will be black after initial clean up I would think.

Quote for another site;
This is from a Dupont Delrin Design Guide

plastics.dupont.com/plastics/pdflit/americas/delrin/230323c.pdf


Surfaces of Delrin acetal resin can be dyed by
either the “Water Solvent Method” or the “Organic
Solvent Method.” Part geometry must be taken into
account when dyeing Delrin acetal resin because
part thickness influences the rate at which staining
occurs. Thin sections stain more rapidly than thick.
Consequently, variations in section thickness will
determine the immersion time required for color
uniformity and tone. Light uniform tones may be
difficult to achieve.
Commercial household dyes such as “Tintex”1
and “Rit”2
have also been used successfully to dye
parts of Delrin acetal resin for color coding. Bath
temperatures of 85–90°C (185–195°F) should be
employed with “Tintex” and “Rit” to obtain ad-
equate dye penetration and good color.
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Old 05-02-2019, 03:58 AM   #5
el gaitero
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Default Re: Recoloring a Delrin/Poly Chanter (??)

Quote:
Originally Posted by zarb View Post

.
Commercial household dyes such as “Tintex”1
and “Rit”2
have also been used successfully to dye
parts of Delrin acetal resin for color coding. Bath
temperatures of 85–90°C (185–195°F) should be
employed with “Tintex” and “Rit” to obtain ad-
equate dye penetration and good color.
I’m sure we’re soon going to see some experimental tie-dyed chanters become available.....
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Old 05-02-2019, 11:05 AM   #6
John Bolt
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Default Re: Recoloring a Delrin/Poly Chanter (??)

Hi all,


I once restored a scared up pc using a heat gun and spinning and it came out looking brand new but I don't know that I'd try this on a thinner pipe chanter. I think if you clamped the chanter in a long wood clamp then clamped that to a table then took strips of cloth with compound and then car wax on them and polished like you were shinning shoes I think it would come out like brand new! Or if you knew some one with a lathe?
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Old 05-08-2019, 08:31 AM   #7
jackhawkpiper97
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Default Re: Recoloring a Delrin/Poly Chanter (??)

This seems like the realm of auto-detailing stuff, because a lot of their job deals with black plastic trim that has faded. Maybe look that route?
Gtechniq, for example: https://www.amazon.com/Gtechniq-C4-P...82258784&psc=1




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Old 05-09-2019, 05:21 PM   #8
Pip01
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Default Re: Recoloring a Delrin/Poly Chanter (??)





My Thanks to All !!

And, well... you know how it goes... phone
calls, e-mails... travel... engagements... and
I have yet the Time... to get to it !!

However... as soon as it (successfully :) does
happen... I shall let you all know what the best
avenue of approach... and the steps to proper
fruition... turned out to be.
(And any bollixes... along the way... )

Regards to All,

Pip01


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Last edited by Pip01; 05-09-2019 at 05:25 PM.
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