Bright Yellow Brass

jhatpro · Posted: Thu Oct 22, 2020 1:52 pm Post subject: Bright Yellow Brass

I bought a used horn and I think the previous owner might have been a a mad chemist. The valve casings are bright yellow. What would cause this?
_________________
Jim Hatfield

"The notes are there - find them.” Mingus

2021 Martinus Geelan Custom
2005 Bach 180-72R
1965 Getzen Eterna Severinsen
1946 Conn Victor
1998 Scodwell flugel
1986 Bach 181 cornet
1954 Conn 80A cornet
2002 Getzen bugle

J. Landress Brass · Posted: Thu Oct 22, 2020 2:31 pm Post subject:

For many years repair techs used Chromic Acid as part of their chem clean process. This make s the brass a very distinct color. I call it radioactive yellow. It can last for years and years and years without tarnishing and stay the bright color.
_________________
Josh Landress
J. Landress Brass, LLC.
38 West 32nd Street, STE 908, NY, NY 10001
646-922-7126
www.jlandressbrass.com

jhatpro · Posted: Thu Oct 22, 2020 2:41 pm Post subject:

That describes the color perfectly! Thanks!
_________________
Jim Hatfield

"The notes are there - find them.” Mingus

2021 Martinus Geelan Custom
2005 Bach 180-72R
1965 Getzen Eterna Severinsen
1946 Conn Victor
1998 Scodwell flugel
1986 Bach 181 cornet
1954 Conn 80A cornet
2002 Getzen bugle

James Becker · Posted: Thu Oct 22, 2020 2:58 pm Post subject:

Overhaul shops have had to resort to non-chronic bright dips.

My first employer had chromic acid bright dip in his shop. Unfortunately all the rinsing down the drain killed the good bacteria on his septic tank! 😳 Besides that, it is highly toxic. ☠️
_________________
James Becker
Brass Repair Specialist Since 1977
Osmun Music Inc.
77 Powdermill Road Rt.62
Acton, MA 01720
www.osmun.com

Our workshop is as close as your nearest UPS store https://www.ups.com/dropoff?loc=en_US