Re: List Cleansing

John Rudiak (wizard@laplaza.org)
Wed, 13 May 1998 15:20:43 -0600

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John Lowen wrote:
>
> Now that the list has been laundried - Can anyone of the chemists out
> there tell me how to blacken brass to use as a waterhouse stop on a
> Darlot lens?
>
> thanks -
>
> john

I take this recipe from the book "Gunsmithing" by Roy Dunlap (sometimes
it pays to have a hobby)

To Blacken Brass (pg402)

Potassium Sulfide- 1 oz
Ammonium Hydrosulphide- 2 1/4 oz
Water- 1 gal

"Dip polished, cleaned parts until deep black in color, wash and dry."

Good luck!
John

-- 
Alchemy Printmaking & Photography
PO Box 633 Ranchos de Taos, NM   87557
http://www.quetzl.com/Alchemy/html.index

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