Silvers soldering

[Peter Simpson 1Participant @petersimpson1]

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 ?

[Peter Simpson 1Participant @petersimpson1]

[Jim NicParticipant @jimnic]

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

[Former MemberParticipant @formermember19781]

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[john fletcher 1Participant @johnfletcher1]

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

[Former MemberParticipant @formermember19781]

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[HOWARDTParticipant @howardt]

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.

[Speedy Builder5Participant @speedybuilder5]

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

[Steve Skelton 1Participant @steveskelton1]

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

[JasonBModerator @jasonb]

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

[Nick Clarke 3Participant @nickclarke3]

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!

[Former MemberParticipant @formermember19781]

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[Peter Simpson 1Participant @petersimpson1]

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

[JasonBModerator @jasonb]

The one they call Tipp-ex rapid like this

[Dave HalfordParticipant @davehalford22513]

Posted by john fletcher 1 on 22/02/2020 15:27:50:

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

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

[Paul LousickParticipant @paullousick59116]

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

[HopperParticipant @hopper]

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

[Jim NicParticipant @jimnic]

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

[JasonBModerator @jasonb]

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

[Dennis RParticipant @dennisr]

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

Dennis

[Peter Simpson 1Participant @petersimpson1]

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

[Peter Simpson 1Participant @petersimpson1]

Completed arms.

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