Re: ATM Method of Blackening Brass

[PFAFF2@delphi.com (Robert C. Pfaff)]

>I make many of my telescope accessories from brass.  I often paint the
>interior of these brass eyepices flat black.  However, when I comes to
>the threaded areas, paint causes the problem of adding to thread
>diameter and flaking off.  Some of the purchased brass optical prodcts
>have a lovely flat black patina to them which does not appear to be a
>typical paint.  Ther most be some ways to either electro-coat or
>electro-deposit such a coating which could be accomplished in a small
>shop.  Does anyone know a method(s) for blackening brass which leaves a
>flat black finish?
>
>Donn Starkey
>dstarkey@solaris1.mysolution.com

I have a very old book of formulas (1932) Yeah its title Book of Formulas
Recipes,Methods and Secret Processes;-)  There are has  6 different
chemical methods to blacken brass in it . I have never tried any of them
but if you wish I could copy the pages for you.

Bob Pfaff