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cmg · 04-04-2008, 12:04 PM

Hi rowuk,
What's the molar concentration of the salt solution required?

I already tried the method on a couple of the slides using hot water and baking soda (sodium bicarbonate), not salt. I did this prior to any Tarnishield application. What I saw there was the lighter, non-deep-purple tarnish lost its sulfides and returned to pure silver quite nicely. The deep purple areas (not the dark stains I see on the bell) barely changed, hence the Tarnishield application that worked well. As the cornet body was primarily dark purple/gray I figured the process effectiveness would be similar so I went right to the Tarnishield.

Here's my question. Is the salt more effective than the baking soda, i.e., does the solution have a higher concentration allowing faster/better transport of the sulfur from the silver to aluminum?

Also, my soak tub requires 3-4 gallons of water to cover the horn, and I've seen on many sites to add 1 cup of baking soda for every gallon. Seems like a lot. Any ideas on how much salt to add to 4 gallons of water?

Thanks.

04-04-2008, 12:04 PM	#4 (permalink)
cmg Pianissimo User Join Date: Mar 2007 Location: Michigan Posts: 53	Re: Dark / Black stains on silver plating Hi rowuk, What's the molar concentration of the salt solution required? I already tried the method on a couple of the slides using hot water and baking soda (sodium bicarbonate), not salt. I did this prior to any Tarnishield application. What I saw there was the lighter, non-deep-purple tarnish lost its sulfides and returned to pure silver quite nicely. The deep purple areas (not the dark stains I see on the bell) barely changed, hence the Tarnishield application that worked well. As the cornet body was primarily dark purple/gray I figured the process effectiveness would be similar so I went right to the Tarnishield. Here's my question. Is the salt more effective than the baking soda, i.e., does the solution have a higher concentration allowing faster/better transport of the sulfur from the silver to aluminum? Also, my soak tub requires 3-4 gallons of water to cover the horn, and I've seen on many sites to add 1 cup of baking soda for every gallon. Seems like a lot. Any ideas on how much salt to add to 4 gallons of water? Thanks.