black inner side of the bell?

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alberttrombone
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black inner side of the bell?

Post 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!
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BGuttman
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Re: black inner side of the bell?

Post 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.
Bruce Guttman
Merrimack Valley Philharmonic Orchestra
"Almost Professional"
tbonesullivan
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Re: black inner side of the bell?

Post 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:

https://www.thebrass-exchange.com/conte ... s-trombone

I'm pretty sure you'd need to completely refinish the bell to have it the way BAC does it.
David S. - daveyboy37 from TTF
Bach 39, LT36B, 42BOF & 42T, King 2103 / 3b, Kanstul 1570CR & 1588CR, Yamaha YBL-612 RII, YBL-822G & YBL-830, Sterling 1056GHS Euphonium,
Livingston Symphony Orchestra NJ - Trombone
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alberttrombone
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Re: black inner side of the bell?

Post 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
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Re: black inner side of the bell?

Post by alberttrombone »

tbonesullivan wrote: Tue Feb 14, 2023 7:18 am 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:

https://www.thebrass-exchange.com/conte ... s-trombone

I'm pretty sure you'd need to completely refinish the bell to have it the way BAC does it.
That looks pretty nice jajajaja
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elmsandr
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Re: black inner side of the bell?

Post by elmsandr »

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

https://www.sciencecompany.com/Patina- ... opper.aspx

Cheers,
Andy
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alberttrombone
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Re: black inner side of the bell?

Post by alberttrombone »

elmsandr wrote: Tue Feb 14, 2023 1:11 pm DIY is easy. Just pay attention to what you’re doing.

https://www.sciencecompany.com/Patina- ... opper.aspx

Cheers,
Andy
Wow... I'm gonna take a look but it doesn't seem that easy jajaja
calcbone
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Re: black inner side of the bell?

Post by calcbone »

elmsandr wrote: Tue Feb 14, 2023 1:11 pm DIY is easy. Just pay attention to what you’re doing.

https://www.sciencecompany.com/Patina- ... opper.aspx

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