Silvers soldering

When silver soldering what is the best method of ensuring that other parts in close proximity to the "joint" does not get soldered. I have made a jig to make some lifting arms. I do not want the arms getting soldered to the jig ?

I use a coat of Snopake typing correction fluid where the solder is not to flow. (Note that this fluid will not correct machining errors!)

Jim

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Lamp black from a candle will also work. When plumbers used lead pipe they used a substance in a Yellow tin called "Plumbers Black" to keep things tidy. They used an old paint brush, dipped it some water, gave it a shake, scrubbed around on top of the black cake and painted it around the pipe, forming a neat band, which prevented solder from going where it wasn't needed. Under ground cable jointers did the same. I have been searching for a supplier for "Plumber Black" for quite some time. It would seem plumber now use plastic pipe where ever possible. John

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Off topic. Some years ago I was told by one of the copper fitting manufacturers, one reason for solderless fittings was having to have a fire Marshall standing by the plumber in refurb buildings during naked flame soldering.

Bill, are gas pipes plastic and compression fittings these days as well ?

I find a little jewellers rouge made into a paste with water and painted onto the surface works best for keeping silver solder from spreading where it isn't wanted.

Steve

If you use correction fluid as I do it should be the solvent based one.

Wondered what 'Plumber's black' could be so did an internet search.

First few results were local plumbers followed by a whole stream of XXXXX adult websites.

The world we live in today!

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Jason which one should I look for. Not sure which ones are solvent based.

The one they call Tipp-ex rapid like this

Phone cables were poly and already being jointed with epoxy back in the late 60s, that boat left a very long time ago along with all the lead cables

Jason,

What do you use to remove the Tipp-ex after soldering? I find it difficult to clean up after it has burnt on.

Paul

You can paint on Milk of Magnesia and let it dry. The solder/braze will not stick to the dried magnesium powder.

Paul

I don't know how Jason removes Tippex, but I find that what I use easily comes off along with any burnt/dried flux residue in the pickle bath and after with a scrub with a toothbrush. (Don't let on to the better half whose toothbrush you use for this.)

Jim

My pickle removes it along with HT5 flux in about 1/2hr, I use Feb brickclean that contains hydrochloric acid

Tipp-ex rapid double pack is on offer at £2.99 in W H Smiths today, seems very good value.

Dennis

Bill this a photo of an embryo lifting arm mounted on the jig prior to silver soldering