Black finish for brass

Sil Horwitz (silh@iag.net)
Wed, 13 May 1998 16:54:55 -0400

At 03:19 PM 98/05/13 +0000, you 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?

You can do it chemically with almost any iron salt, but I use a permanent
black marker. Does a beautiful job if the brass is clean, and if you
overspray with a matte lacquer or varnish, can't be distinguished from the
chemical treatment. Lot easier and less messy, too.

Sil Horwitz, FPSA
Technical Editor, PSA Journal
silh@iag.net
Visit http://www.psa-photo.org/