On Sat, 14 Oct 2017 16:53:40 -0000 (UTC), bob prohaska
wrote:

whit3rd wrote:
On Friday, October 13, 2017 at 6:46:26 PM UTC-7, bob prohaska wrote:
I just broke a drawer pull...
If I can find something to coat the ring pull, so the solder
won't wet it, I think there's a decent chance of success.

There's a commercial product, Tix Anti-Flux, that should work.
That in concept is exactly what I'm looking for. Trouble is, they
say it's best with SO250 solder, which appears to be low melting
point and has no strength or other specification. Since the original
brass broke, I think silver braze will be necessary but I'll email
them and learn what I can.

Me, I just stay sloppy, and buff the excess off afterward.

Can't do that in my predicament; if the solder flows between
ring pull and plate there's no way to get it out.

Thanks very much for posting!

bob prohaska

Hi Bob. This may be a reach, but the anti-fluxes used in silver
brazing dental work are graphite (pencil lead, or plumbago in alcohol)
and whiting (calcium carbide) in water or alcohol.

I have no experience with them, but I encountered them several times,
years ago, when I wrote about brazing.

Good luck!

--
Ed Huntress