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Firescale and pripps?


#1

I usually just soak up all the I can from all of you
experience people out there, (thank you all very kindly) but this
firescale I keep getting is driving me nuts.

I know firescale has been a thread before and I think I understand
what causes it, ( way too much heat directly on my metal), what I
don’t know is exactly what I should be doing to prevent it. I thought
I needed to heat the entire piece in order before soldering. I have
changed to a larger tip to hopefully accomadate the size of my metal
and I thought I was using my torch in a circular motion to heat
before zeroing in on the soldering but I am still coming out with
firescale.

I talked with several jewelers and it was suggested to spray the
metal with pripps before soldering. My first thought behind all of
this was to make the pripps myself since it looks like I will be
using quite a bit of it. I went into the archives ( do you know how
many there actually are on pripps and firescale) and got the recipe,
whipped up a large quantity if it but have since found my pripps
solidified in my jar and is as solid as a rock.(obviously I did
something wrong here) so I will purchase it this next time and save
myself time and the hassle. Please help, who sells pripps and do any
of you have suggestions that will help me with my firescale problem?
thanking you all head of time…Karen


#2
Please help, who sells pripps and do any of you have suggestions
that will help me with my firescale problem? 

Hi Karen,

I really like the Prips Flux made by Griffiths, and sold by Grobet
suppliers. It is important to de-grease the metal first—otherwise
the spray just peels off. I usually use scotch brite pads and/or
pumice for this. Spray a bit on, and then heat until it turns to a
white powder. Then heat and spray alternately, in short and frequent
bursts, until the whole thing is coated in white powder. Try to keep
it at a moderate temperature, such that the spray turns to powder as
soon as it hits the metal, yet, not so hot that the metal that is not
yet coated oxidizes.

Cindy Cynthia Eid
http://www.cynthiaeid.com
P.O.Box 750007
Arlington Heights,
MA 02475
Phone and fax: (781) 863-0140