black inner side of the bell?

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alberttrombone
Posts: 59
Joined: Oct 16, 2018

by alberttrombone »

Hello!

I've seen some trombones with a black inner side of the bell. For ex. the B.A.C. Custom Voyager.

Is this a black lacquer? or there is a way to turn a "regular" bell a black one with other procedures?

It would be for a 3B I have.

Thanks!
B
BGuttman
Posts: 7368
Joined: Mar 22, 2018

by BGuttman »

There is a black lacquer.

There is also a black oxide treatment for copper and copper alloys (which will need some kind of protective coating afterward). I believe Inderminen used the black oxide treatment for their black bells.

If you decide to try a DIY, watch out. Too thick a coating of a lacquer will dull the sound. Uncontrolled black oxide treatment will reduce the metal thickness.

If you decide this is what you really want, get help from a tech and a professional in these kinds of treatments.
T
tbonesullivan
Posts: 1959
Joined: Jul 02, 2019

by tbonesullivan »

I have seen black lacquered trombones, but I think the BAC trombones have a treatment done to the bell that turns it black. Then they leave the black intact on the inside of the bell, while buffing it off the outside, as far as I can tell. I also have seen trombones they rebuilt that are like that, like this one:

<LINK_TEXT text="https://www.thebrass-exchange.com/conte ... s-trombone">https://www.thebrass-exchange.com/content/bach-50bg-bac-custom-early-80s-bass-trombone</LINK_TEXT>

I'm pretty sure you'd need to completely refinish the bell to have it the way BAC does it.
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alberttrombone
Posts: 59
Joined: Oct 16, 2018

by alberttrombone »

Thanks Bruce! I'm not gonna try a DIY... jejejeje just wanted to know the different options available.

I think I'd prefer the lacquer option, it seems less harmful for the bell.
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alberttrombone
Posts: 59
Joined: Oct 16, 2018

by alberttrombone »

[quote="tbonesullivan"]I have seen black lacquered trombones, but I think the BAC trombones have a treatment done to the bell that turns it black. Then they leave the black intact on the inside of the bell, while buffing it off the outside, as far as I can tell. I also have seen trombones they rebuilt that are like that, like this one:

<LINK_TEXT text="https://www.thebrass-exchange.com/conte ... s-trombone">https://www.thebrass-exchange.com/content/bach-50bg-bac-custom-early-80s-bass-trombone</LINK_TEXT>

I'm pretty sure you'd need to completely refinish the bell to have it the way BAC does it.[/quote]

That looks pretty nice jajajaja
E
elmsandr
Posts: 1373
Joined: Mar 23, 2018

by elmsandr »

DIY is easy. Just pay attention to what you’re doing.

[url]<LINK_TEXT text=" https://www.sciencecompany.com/Patina- ... opper.aspx"> https://www.sciencecompany.com/Patina-Formulas-for-Brass-Bronze-and-Copper.aspx</LINK_TEXT>

Cheers,

Andy
A
alberttrombone
Posts: 59
Joined: Oct 16, 2018

by alberttrombone »

[quote="elmsandr"]DIY is easy. Just pay attention to what you’re doing.

[url]<LINK_TEXT text=" https://www.sciencecompany.com/Patina- ... opper.aspx"> https://www.sciencecompany.com/Patina-Formulas-for-Brass-Bronze-and-Copper.aspx</LINK_TEXT>

Cheers,

Andy[/quote]

Wow... I'm gonna take a look but it doesn't seem that easy jajaja
C
calcbone
Posts: 225
Joined: Jun 11, 2018

by calcbone »

[quote="elmsandr"]DIY is easy. Just pay attention to what you’re doing.

[url]<LINK_TEXT text=" https://www.sciencecompany.com/Patina- ... opper.aspx"> https://www.sciencecompany.com/Patina-Formulas-for-Brass-Bronze-and-Copper.aspx</LINK_TEXT>

Cheers,

Andy[/quote]

Hm…would these work on nickel silver? Asking for a “friend…”