Dave Platt wrote in message
news
In article ,
Wild_Bill wrote:

The reason I didn't mention muriatic acid (swimming pool chemical,
concrete
cleaner/etcher, and good for removing rust from steel) because the
muriatic
I've seen has had a dark amber color.

Hmmm... odd.

The quart of muriatic acid I bought at a local hardware store (to make
PC-board etchant) is water-clear. No color at all, until after I
etched... at which point the copper(II) chloride makes a lovely
blue-green.

--
Dave Platt AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!


I tried repeating the leaded solder + vinegar heated and potassium iodide
and no yellow colour after a day.

Remembered I had some 10 yearold car-body treatment Loctite Rust Remedy in
the shed.
With SnPb solder shavings and water ,boiled up for 30 seconds turned to a
clear strong orange colour over a cloudy mass , if left to settle.
Boiling the loctite and water on its own remained cloudy cream colour
throughout, no settling out.
Sn/Ag/Cu gave a cloudy very slight yellow colour.
Tried some iron filings, as there is supposed to be a colour change to blue
for rust treatement, and the test tube sample went via grey-green to black.
Will try Cu and Zn filings and Sn filings and then repeat the set again to
see if there is consistency


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm