Pouring silver sheet ingot

[paolopogi00]

I wanna touch it..

[spacebrdcst]

Dude you missed:D

[azsolymosi]

Heat the mold before the pour. Use a soup spoon of borax per troy ounce of metal. I use a propane torch because it burns very hot and clean. HERE'S YOUR TRICK!!! After heating the mold, just before you pour, squirt 3-in-one oil into the mold. Make sure you have just enough seal along the bottom to keep most of the oil in during the pour. I've been in the jewelry industry for 25 years and this is how I do it. It's worth the money to get a good crucible. Try it and see how well it works for you.

[TheReaperofthefallen]

where do you get your silver... and is it possable to seperate lead from silver sawter?

[azsolymosi]

@TheReaperofthefallen: You need some very strong acids and expensive equipment, and it's nearly impossible. the amount of silver in solder is not worth the effort unless you have a dump truck full.

[LegioXFretensis]

How did you go about removing the borax glass afterward? I'm having problems with the tiny gobs of it in crevices to small for hammering or chipping out.

[fedaikn]

@LegioXFretensis removing borax from silver is something that silversmiths do all the time. it is called pickling and for that purpose they dip the object into a pickling bath. a simple pickling solution is a 10-30% sulphuric acid solution, but jewellers use a sulhphate salt or something else, they buy it from a supplier.

[clubdore]

I hade the same prob! Gona try it tomoro.. ty

[corpralj3]

@fedaikn Can I ask what type of torch you are using in this video? Thanks.

[fedaikn]

@corpralj3

it's a CFH butane torch, the type used for soldering copper tubing. it can be also be used for brazing. it works with 190g gas cartridges

google up the word lötlampe, you'll see it in the results

[panzuman]

use talcom powder its easier

[fedaikn]

@panzuman yes, talcum powder is a lot easier to apply. talcum powder is mainly magnesium silicate, a heat resistant material but not the best for this job. unlike carbon from the soot particles it cannot generate a reducing carbon monoxide layer and thus fails at preventing oxidation of the copper contained within the alloy

[panzuman]

@fedaikn huh so would you suggest i buy lampblack then? because i bought talcum powder for this sole purpose because im getting silver in a few weeks and i dont want to ruin the silver

[fedaikn]

@panzuman there's no better way to find out than by trial and error. i guess the talcum powder is not so expensive but you need not necessarily buy lamp black, you can just smoke your mold with the torch that has only acetylene flowing or with some sort of garden light that runs on lamp oil.

the thicker the soot layer you manage to deposit, the better it will insulate. there is however a limit, you know when you should stop smoking it when you see the soot layers starting to peel off . good luck

[panzuman]

@fedaikn i see thank you for your help but what about casting jewlery can you use this as well?

[azsolymosi]

@panzuman You need some very strong acids and expensive equipment, and it's nearly impossible. the amount of silver in solder is not worth the effort unless you have a dump truck full.

[7777dmith7777]

You can also preheat the mold to almost orange hot and it will fill nice and smooth

[fedaikn]

@7777dmith7777 might work with orange hot mold, yet the risk of having the silver stick to the mold is too great to be acceptable. the soot method seems more economical and less contaminating to me.

[blairestein]

In regards to the torch, how long did it actually take you to melt the silver? I use a trigger mapp torch that i got from home depot, but its kinda heavy. and where did you get the tubing?

[fedaikn]

@blairestein about one and a half minutes, starting with a cold crucible/laddle

i had the tubing at home, it is rectangular steel tubing which now holds my fence erect. i can't really tell where you can buy it from since we live in different countries but down here it can be bought at a shop that sells construction materials, they have all sorts of steel tubing and steel bars like rebar steel

[warmaster4]

did you use steel for the mold? because usually you use sand molds.

[fedaikn]

@warmaster4 yes, it is steel. it is a piece of rectangular steel tubing. the sand molds you have seen before were in a early stage of experimenting. you could say that i advanced.

but i also learned from them. i have to make a video on how to make refractory clay crucibles when i have time

[boochieboy814]

What kind of torch was that?

[Leysanderduldulao]

fedaikn,,I saw you adding some powder. Wht's that a BORAX  powder or something?

[fedaikn]

@Leysanderduldulao i see you are from the philippines so i am not sure if you can get it in the same places as i can. Borax is a white cristaline substance, looks like sugar. it melts at about 740 deg. celsius and covers the metal surface, looks like honey when molten but once it solidifies it becomes glassy. given this property, it's main use is as flux as it can coat a heated metal thus preventing the oxigen from reaching it.

read more about it on " en wikipedia or g / wiki / Borax "

[fedaikn]

@Leysanderduldulao i use to go to the pharmacy to get borax in small quantities. usually pharmacies that also prepare medicine have this ingredient. another place where i can find it abundantly is a a hardware store that has got welding supplies. borax is used as flux for brazing (it is a form of soldering, just at higher temperatures, over 400deg celsius).

borax also helps melt metals, it reduces the amount of energy consumed during the heating process and helps also eliminate impurities.

[Holidats]

To fix the problem, heat the mould so it's red hot.

[fedaikn]

@Holidats the goal is to prevent the silver from cooling. one way is to heat everything it comes in contact with (your method of heating to red hot) or preventing it from coming in contact with cold surfaces (especially metals, they act as heat sinks) which implies some sort of insulation.

i found it to be more economical to just smoke the molds and deposit soot on them, it is a resistant insulation and i don't have to waste propane for heating the molds. economical

[davewilson24]

hi what tourch is that ?

[fedaikn]

it's a CFH butane torch, the type used for soldering copper tubing. it can be also be used for brazing. it works with 190g gas cartridges

google up the word lötlampe, you'll see it in the results

[1axvn]

I don't think I'll do it that way, hammering seem easer to me.

[fedaikn]

-well, i cannot hammer on bits of scraps and coins...somehow i need to get a sheet ingot in order to hammer out a sheet. this setup is quit cheap and not hard to make

-i don't have a rolling mill, so yes, i use the hammer, just like the gipsies do it

[1axvn]

do the gipsies really do it that way.

[fedaikn]

certainly some still do it that way. the coppersmith gipsies mostly make their items by hammering. i guess that they nowdays the buy copper sheet, but in the past they made it themselves.

add this to the youtube homepage address watch?v=Gih2AYInn70