I was studying metallurgy chapter and this process came , i could not imagine what's actually happening, so i decided to watch a video on it , and your video perfectly explained it ! Thanks !! Now its clear.
Please sir ,though am out of the leson you provide here,but i need your help from problem,am dealing with cyanidation gold leching in vats ( vat leching) ,but during my running i have experieced a blue solution apear in the system,and shows a high amount of copper dissolved and sulphur ,so my you help me how do in order to deal and treat copper and sulfur from the gold ore during leaching in order order to perish such bluewish occured? Please help me
@@emmanuellisso4346 I’m not familiar with process you mentioned but this is what I found on internet: “The treatment of a copper sulphide-bearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching was investigated. Dissolution behaviour of gold and copper in these leaching systems was demonstrated. Severe interference by the copper containing sulphides with cyanide leaching of gold is observed at ρ(NaCN)≤5 g/L. This is consistent with speciation calculations. Ammonia pretreatment is shown to readily eliminate the copper interference, allowing almost complete extraction of gold with concomitantly low reagent consumption in subsequent cyanide leaching. In ammoniacal cyanide system, Box-Behnken experimental design shows the main and interaction effects of NH3, NaCN and Pb(NO3)2. The concentrations of NH3 and NaCN are statistically confirmed to be significant factors affecting extraction of gold while the effect of Pb(NO3)2 is limited. Increasing the concentration of NH3 improves the selectivity and extent of gold extraction and reduces the cyanide consumption. The contribution of reagent interactions to gold extraction is statistically insignificant. These findings highlight that ammonia pretreatment and ammonia-cyanide leaching are promising approaches for the treatment of gold ores with high copper sulphide content.” www.researchgate.net/publication/272754216_Treatment_of_copper-rich_gold_ore_by_cyanide_leaching_ammonia_pretreatment_and_ammoniacal_cyanide_leaching
Im so sorry if this is a stupid question. I am still very new to this and just found you can refine gold this way without chemical process which i plan to do, but would like to try this first. Anyway, would you be able to do the same with zinc instead of lead to leachch out the base metals and use some plaster as the cupl or using a regular sil crucible to pull out the base metals? Again, so sorry if this is a stupid question. I am willing to get the needed items, just wondering if i could use what i already have on hand. Thank you so much for sharing your videos amd showing everyone the process and how to. It is very much appreciated.
The question is not stupid. Plaster (gypsum) will not work as materiel for cupels(I've used cement, bone ash, magnesia, hydrated lime, heat treated limestone powder etc.) , zinc will form an alloy with some of the base metals, copper being the most troublesome for this process. The only substitute of lead that I know of is bismuth (when talking about cupellation). By cupellation you can remove only base metals, if as in this video you have AuAgCuZn alloy, after cupelling you'll be left with an AuAg alloy.
@@OwlTech333 thank you so so much. Thats exactly what i needed to know. I truly appreciate your willingness to help and give advice. Thank you so much!
Pls what fuel source did you use cos I tried using methane gas and nothing seems to work only that the gold base metal became red hot but did melt.....
Can you help me with the propane aspect of this? Propane is like 1900°F, did you have to keep the flame distant? Ive tried using propane multiple times and have never gotten a gold bead.
@OwlTech333 I had gold flakes from the auburn state park, and I was using lead as a collector metal. When I used silver, I could measure the amount of gold, but I assumed lead was more reactive. I think california gold is like 93% pure, that'd make sense because some flakes can be silver or copper, but I was going to try chapman flux and thinner, assuming the high gold purity was the problem. It obviously has quite a bit of lead in the button, but I was thinking a lack of impure gold was causing my problems with cupellation.
@OwlTech333 well that sounds a little off on the basis I went to a state park, but that's a good backup plan I think. Would you say you were pessimistic about my solution?
I was just passing by , I am sorry i am not sure i get this as it really looks to simple 😂 can i actually just use cement powder and fishing sinkers (lead) + heat to leach the impurities out eg the led leaches out the other base metals etc then soaks into the cement powder leaving a higher purity gold ? , 5:1 led to gold in compacted cement bowl and just head till its gold left ? , is it really this simple , ive not dared try to smelt any of my nuggets or anything but if it is this easy i would really like to male some gold marron and snakes etc from my nuggets and old jewellery 😃, also would this be possible in an electric smelting furnace if you pack the crucible 💁♂️, thankyou 😁
It’s really that “easy” after all this is the oldest refining method known to humanity still in use to this day. But there’s more to it than just dumping impure gold and lead shot into a cement filled bowl and heating it…
@@OwlTech333 thankyou for such a prompt reply 😃😁 I though it looked a little to simple 🤣, I have a proper 5kg led ingot (not sinkers ) and about 60g of 9k and about the same of 24k nuggets , if I send you my email would it be possible for you to tell how to do this so I can try it as you have done here please 😁 before I stuff it up trying it 🤣 kindly Luke 😁
Is the ratio of lead used in cupellation the same as the Kt. itself..? like 14k is 58/42....Would i use 42% of lead to the ratio of Gold for the cupellation to yield 24K or close..?
Heya... Thanks for sharing ! Really good work... As usual may i say !!! ;) Ag and some contamination must be the add in final weight... But it's also why it's best to refine by yourself... Always a pleasure to see your videos ! And i bet you will have a lot of surprises if you refine jewelery stuff... Enjoy !!!
Can this work with copper that has gold in it ? Will the Portland cement absorb the copper ???? Do you just add led with the copper that had gold in it ????
@@OwlTech333 I don't know the copper button with gold is pretty heavy ..... But is it still possible to cuppelle it ???? Have you cupelled copper with gold in it with Portland cement ?
It's lead to impurities ratio rather than pb:au, you must have enough lead to oxidize all base metals. If you have enough lead you can cupel gold filled although IMHO it's better to strip the gold in a lead bath.
@@OwlTech333 Please explain 'lead bath'. I get some gold-filled in my buys. My refiner doesn't like it too much. I'd like to concentrate the gold -filled somewhat. Thanks.
This technique is working even with a bigger quantity of scrap gold mixed carats, for example 250g? Will be enough the same type of flame torch for a bigger cupel? I want to try to increase the carats grade of my scrap gold using cupellation, but I need more informations before attempting. How is easier, in small quantities, or in bulk? Thank you. Stefan.
This is somewhat off topic, I was wondering if this process might work with hard drive platters. Separating the Platinum from aluminum in the slag from melting.
@@OwlTech333 it finally started really pulling it in after while. Maybe I had too much in there? I had to change it a couple times. I meant to say lead oxide lol but after a while it started sucking it up. I thought I had quite a bit of gold, but didn't turn out that way. I started with quite a bit of raw material. It's an amazing process thanks for showing how to do it. It's crazy how much actual pure gold you're left with. It was about a gram. It's OK was still fun. I'm gonna try silver next. Bought a bunch of "junk" that came from a jeweler!
a shallow, porous container in which gold or silver can be refined or assayed by melting with a blast of hot air which oxidizes lead or other base metals.
👍Ха у тебя от купиляции чище выходит чем у некоторых от востановителей😀плёнки оксидов нет почти и видно что по сплаву они не плавают и это без буры почти в конечном.
С аммиачной силитрой не пробывал ни когда в конце?У нас в Греции гавёного качества все эти удобрения,процент низкий,бадяженые.По идее в конце должно почистить
@@OwlTech333 сульфат натрия как то давно пробывал,горелками,не тигль...используют в таких делах,вроде тоже окисляет хорошо,горелкой трудно понять😀кипит веть и брызгается сплав.
know is this technique dangerous for your health? (breathe the smoke) and this technique does not need chemicals (nitric acid, etc.). The gold you get is 999.9% pure gold. thank you and good evening.
If you breath the smoke this could be one of there most dangerous techniques out there, just like inhaling acid fumes or falling into a volcano! So NEVER breath the smoke, inhale the fumes or step in the lava! For cupellation you don’t need acids, but you may need other chemicals like borax, Portland cement, sodium nitrite etc. The purity of the gold you get depends on the metals your gold is alloyed with if there are other PM in the alloy they will remain with the gold, if only base metals are present with the gold those skilled in the art can achieve 99+
You Really went out your way, to give us all facts about your gold burn. Is that Portland cement or some other cement or mix and is the metal your adding Zinc or Lead and that's how I would do it. By adding Borax near the the end, of the burn.
Лайк конечно .......кроме свинца и золота еще что нибудь добавляли ?? для купелирования золота вроде серебро не нужно , серебро лишь для палладия и платины
I was studying metallurgy chapter and this process came , i could not imagine what's actually happening, so i decided to watch a video on it , and your video perfectly explained it !
Thanks !! Now its clear.
Glad it helped
Is there any video on amalgamation of gold ?
So, there's this thing with 3 extendable legs upon which to fix a camera to keep the audience from the throes of motion sickness. Google tripod.
Thanks for pointing that out!
Please sir ,though am out of the leson you provide here,but i need your help from problem,am dealing with cyanidation gold leching in vats ( vat leching) ,but during my running i have experieced a blue solution apear in the system,and shows a high amount of copper dissolved and sulphur ,so my you help me how do in order to deal and treat copper and sulfur from the gold ore during leaching in order order to perish such bluewish occured? Please help me
@@emmanuellisso4346 I’m not familiar with process you mentioned but this is what I found on internet: “The treatment of a copper sulphide-bearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching was investigated. Dissolution behaviour of gold and copper in these leaching systems was demonstrated. Severe interference by the copper containing sulphides with cyanide leaching of gold is observed at ρ(NaCN)≤5 g/L. This is consistent with speciation calculations. Ammonia pretreatment is shown to readily eliminate the copper interference, allowing almost complete extraction of gold with concomitantly low reagent consumption in subsequent cyanide leaching. In ammoniacal cyanide system, Box-Behnken experimental design shows the main and interaction effects of NH3, NaCN and Pb(NO3)2. The concentrations of NH3 and NaCN are statistically confirmed to be significant factors affecting extraction of gold while the effect of Pb(NO3)2 is limited. Increasing the concentration of NH3 improves the selectivity and extent of gold extraction and reduces the cyanide consumption. The contribution of reagent interactions to gold extraction is statistically insignificant. These findings highlight that ammonia pretreatment and ammonia-cyanide leaching are promising approaches for the treatment of gold ores with high copper sulphide content.”
www.researchgate.net/publication/272754216_Treatment_of_copper-rich_gold_ore_by_cyanide_leaching_ammonia_pretreatment_and_ammoniacal_cyanide_leaching
बहुत सुंदर लगा है जी। शुभ कामनाएं आशीर्वाद ❤❤❤❤❤❤❤
SIR MAY I SAY THAT THIS IS AN EXCELLENT VIDEO -
THANK YOU FOR THE EDUCATION
You are most welcome
Im so sorry if this is a stupid question. I am still very new to this and just found you can refine gold this way without chemical process which i plan to do, but would like to try this first. Anyway, would you be able to do the same with zinc instead of lead to leachch out the base metals and use some plaster as the cupl or using a regular sil crucible to pull out the base metals? Again, so sorry if this is a stupid question. I am willing to get the needed items, just wondering if i could use what i already have on hand. Thank you so much for sharing your videos amd showing everyone the process and how to. It is very much appreciated.
The question is not stupid. Plaster (gypsum) will not work as materiel for cupels(I've used cement, bone ash, magnesia, hydrated lime, heat treated limestone powder etc.) , zinc will form an alloy with some of the base metals, copper being the most troublesome for this process. The only substitute of lead that I know of is bismuth (when talking about cupellation). By cupellation you can remove only base metals, if as in this video you have AuAgCuZn alloy, after cupelling you'll be left with an AuAg alloy.
@@OwlTech333 thank you so so much. Thats exactly what i needed to know. I truly appreciate your willingness to help and give advice. Thank you so much!
Puerto Shecan you're welcome 🙂
انت اينسان. رائع شوكرن
It would be helpful if you said what your adding to the cupell. Was that lead, or bismuth? And the white stuff I assume is borax ...
In this video I was using lead, but you can use but bismuth instead
Yes the white stuff added at the end is borax
What was the powder you compacted and did you use a specific gold to lead ratio?
The powder is ordinary Portland cement, Pb : Au alloy 4-5 : 1
Im so glad i came across this video. Or i would have gone down the route of using acids to refine the gold that i have.
Thanks for showing yhis wonderful ancient method.For 100 gms of gold how much lead would be required?
Depends on the contaminant
please explain what the powder is you used to make the cupel
@@lancemillward2462 ordinary cement, nothing special
Buenas tardes amigo, ecxelente tus videos sabes recuperar iridio ???
No
So basically a metal pan with Portland cement in it works like an actual cupel?
Exactly
@@OwlTech333 👍👍
are cupelling can be done with venturi air burner or forced air burner sir ?
thankyou
Yes
@@OwlTech333 thankyou
hello, how many lead did you use?
about 15g in total
@@OwlTech333 Thank you
Thanks for the video. What do you do with the lead oxide and other waste?
smelting it to lead metal
Olá, parabéns pelo vídeo, para o Cadinho você utilizou somente cimento Portland ou adicionou pó de osso?
Portland cement only
Pls what fuel source did you use cos I tried using methane gas and nothing seems to work only that the gold base metal became red hot but did melt.....
*didn't
Propane
@@OwlTech333 propane? Hmmmmmmm.....why methane wouldn't work?
Pls apart from pure propane gas, will mixture 80%prop.. and 20%but.. work?
Yes
What is the powder that you packed into the spoon? Just carbon?
Portland cement no carbon
@@OwlTech333 thank you!
No problem
how many degree celcius of heat requir?
about 800C
Can you help me with the propane aspect of this? Propane is like 1900°F, did you have to keep the flame distant? Ive tried using propane multiple times and have never gotten a gold bead.
What are you trying to cupel?
@OwlTech333 I had gold flakes from the auburn state park, and I was using lead as a collector metal. When I used silver, I could measure the amount of gold, but I assumed lead was more reactive. I think california gold is like 93% pure, that'd make sense because some flakes can be silver or copper, but I was going to try chapman flux and thinner, assuming the high gold purity was the problem. It obviously has quite a bit of lead in the button, but I was thinking a lack of impure gold was causing my problems with cupellation.
Add silver of known amount and purity, also copper is very difficult to remove by cupelling
@OwlTech333 well that sounds a little off on the basis I went to a state park, but that's a good backup plan I think. Would you say you were pessimistic about my solution?
Are the flakes mixed with something else like sand dirt etc. or they’re metal only?
I was just passing by , I am sorry i am not sure i get this as it really looks to simple 😂 can i actually just use cement powder and fishing sinkers (lead) + heat to leach the impurities out eg the led leaches out the other base metals etc then soaks into the cement powder leaving a higher purity gold ? , 5:1 led to gold in compacted cement bowl and just head till its gold left ? , is it really this simple , ive not dared try to smelt any of my nuggets or anything but if it is this easy i would really like to male some gold marron and snakes etc from my nuggets and old jewellery 😃, also would this be possible in an electric smelting furnace if you pack the crucible 💁♂️, thankyou 😁
It’s really that “easy” after all this is the oldest refining method known to humanity still in use to this day. But there’s more to it than just dumping impure gold and lead shot into a cement filled bowl and heating it…
@@OwlTech333 thankyou for such a prompt reply 😃😁 I though it looked a little to simple 🤣, I have a proper 5kg led ingot (not sinkers ) and about 60g of 9k and about the same of 24k nuggets , if I send you my email would it be possible for you to tell how to do this so I can try it as you have done here please 😁 before I stuff it up trying it 🤣 kindly Luke 😁
Did the Kt. of the gold go up...after the cupellation?
yes
Is the ratio of lead used in cupellation the same as the Kt. itself..? like 14k is 58/42....Would i use 42% of lead to the ratio of Gold for the cupellation to yield 24K or close..?
@@kennyclark4510 no usually takes much more especially if the alloying base metal is copper
Heya...
Thanks for sharing !
Really good work... As usual may i say !!! ;)
Ag and some contamination must be the add in final weight...
But it's also why it's best to refine by yourself...
Always a pleasure to see your videos !
And i bet you will have a lot of surprises if you refine jewelery stuff...
Enjoy !!!
Thanks for the kind words!
I have some lead in a piece of gold is this just a metal spoon or some powder in side it please
The powder inside the metal spoon is Portland cement
Thank you for sharing amazing video, portland cement, stainless spon, and lead am i right sir?
Yes, correct
Can this work with copper that has gold in it ? Will the Portland cement absorb the copper ???? Do you just add led with the copper that had gold in it ????
yes, just takes more lead when copper is involved, a lot more...
@@OwlTech333 how much lead do you think for an inch and a half copper cone mold with gold in it ?
@@OwlTech333 do you have your torch on high heat how high do you have your torch set at when heating ?
@@turnerstucki9776 what is the weight of the Cu and the Au? anyway i don't think this is the way to go especially if you have an alloy of Cu and Au
@@OwlTech333 I don't know the copper button with gold is pretty heavy ..... But is it still possible to cuppelle it ???? Have you cupelled copper with gold in it with Portland cement ?
Thanks for all the info. 👍
Any time!
is lead a requirement in gold cupellation?
yes
You can also use bismuth if you are worried about the toxicity of lead.
What kind of crucible its iron
Stainless steel
Can you do this with Gold Filled Jewelry as well? Also how do you calculate gold to lead ratio?
It's lead to impurities ratio rather than pb:au, you must have enough lead to oxidize all base metals. If you have enough lead you can cupel gold filled although IMHO it's better to strip the gold in a lead bath.
@@OwlTech333 Please explain 'lead bath'. I get some gold-filled in my buys. My refiner doesn't like it too much. I'd like to concentrate the gold -filled somewhat. Thanks.
can u do the same with lead and silver please
sure: th-cam.com/video/MwDfUxgNxeA/w-d-xo.html
This technique is working even with a bigger quantity of scrap gold mixed carats, for example 250g? Will be enough the same type of flame torch for a bigger cupel? I want to try to increase the carats grade of my scrap gold using cupellation, but I need more informations before attempting. How is easier, in small quantities, or in bulk?
Thank you.
Stefan.
Split in 50g batches the torch should be ok
@@OwlTech333 merhaba portland çimentosu cupel altın kaybı oloyormu ne kadar oluyodur
@@enesozsar7368 Merhaba! Altın kaybolmaz, sadece baz metaller çıkarılır
@@OwlTech333 teşekkür ederim beyaz portland çimentosu kullanabilirmiyiz ve portland çimentoların hepsi uygunmu
@@enesozsar7368 evet beyaz çimento da kullanabilirsiniz
When you added lead oxide?
I added lead which was oxidised to lead oxide during cupellation
Which paowder ad in this name plzzzzz bro
Portland cement
@@OwlTech333
Whats is ezi name this sement
@@DrSalmaAlmaOnline ordinary cement, the one you put in concrete
Sick song bro! Go go go!🎉
Hello sir I need your help I have gold powder it's mixed with sand so I don't know how to take it out from the sand it's been 3 months now 😢😢
@@samekaykhosh8388 mixed in what proportion?
Is the silver left behind?
No it stays with the gold
Could you tell me what ratio of lead to gold is,is it like same weight gold to lead 50% of each
Many thanks and keep up the good work
you can start with 50% and if its not enough you can always add more when the button freezes
Çimento mu kullandınız. Bunu ıslatmak yada bir süre beklemek gibi birşey gerekiyormu
Dry
Great vid. Just wondering, how long did the process take all up and what metal is the spoon please?
About 15-20min the spoon is made from stainless steel
@@OwlTech333 Thanks for help and quick response. Currently trying to figure out a affordable method of refining gold from gold filled jewelry.
This is somewhat off topic, I was wondering if this process might work with hard drive platters. Separating the Platinum from aluminum in the slag from melting.
Nice. How long does it take to heat up to finish cupellation? Is possible to recover lead from cupel? because it might be toxic waste
Thanks! Depends on the amount of lead. Lead can be recovered from the cupels
@@OwlTech333 And how please? This is ecological question
@@kristianprokupek6606 pretty sure it forms a slag that you can melt again and get lead metal which can be reused.
If you mix the lead oxide from the cupels with carbon (charcoal) and heat with a reducing flame, you can reduce the oxide back to lead metal
Very cool!
But what about copper? Is it also absorbed with lead?
yes
How long did that take you
About 40 minutes
What did you drop in it at the end
@@zacharylutzo3906 pinch of borax
Познавательно для дополнительного опыта про аффинаж золота.
How much time it takes for complete process
This one took me about 40 minutes to complete
How long does the cupellation process take?
depends, this one took about 40 min
Ugh my lead is not soaking into my portland cement!
lead is not supposed to get absorbed by the cupel, lead oxide is
@@OwlTech333 it finally started really pulling it in after while. Maybe I had too much in there? I had to change it a couple times. I meant to say lead oxide lol but after a while it started sucking it up. I thought I had quite a bit of gold, but didn't turn out that way. I started with quite a bit of raw material. It's an amazing process thanks for showing how to do it. It's crazy how much actual pure gold you're left with. It was about a gram. It's OK was still fun. I'm gonna try silver next. Bought a bunch of "junk" that came from a jeweler!
Nice video and how do the lead gold mixes get more 10 kg something
How much lead to how much gold
10:1
would this be effective for higher carat gold? cheers
Yes, when you are fusing the gold with lead you are lowering the karat .
Thanks for your response....
Always welcome
What is cupel
a shallow, porous container in which gold or silver can be refined or assayed by melting with a blast of hot air which oxidizes lead or other base metals.
👍Ха у тебя от купиляции чище выходит чем у некоторых от востановителей😀плёнки оксидов нет почти и видно что по сплаву они не плавают и это без буры почти в конечном.
С аммиачной силитрой не пробывал ни когда в конце?У нас в Греции гавёного качества все эти удобрения,процент низкий,бадяженые.По идее в конце должно почистить
нитрат натрия (натриевая селитра) пользуюсь, но не данном видео
@@OwlTech333 сульфат натрия как то давно пробывал,горелками,не тигль...используют в таких делах,вроде тоже окисляет хорошо,горелкой трудно понять😀кипит веть и брызгается сплав.
аммиачную неиспользуют - натривую!
А как визуально опредилил - что уже хватит греть горелкой ?
If the translation is correct then I think he just uses the red hot glow to determine the right temp.
This maybe a dumb question but can you use the cupellation process with gold filled jewelry? And if yes, would I add lead to the cupell?
Yes and yes
@@OwlTech333 Thank you. How long is the cupellation process? Also when cupelling gold filled jewelry, what is the ratio of lead to gold filled? thanks
Здравствуйте! Из чего порошок тигля?
портландцемент
Hy bro this is without Borax ?????.
Yes
Que material usas para hacer el crisol ese tech ?
aquí usé cemento
@@OwlTech333 genial y ese metodo funcionara con los pines dorados de las placas de las pc ? Muchas gracias por responder :D
@@cafearcade2873 Sí, pero no lo recomiendo especialmente en pines de cobre o latón.
What was the initial purity of your gold. I understand that the final purity is now 18k.
How now to separate gold from silver?
inquarting followed by nitric acid parting
На костяной муке тоже получается
Explain the method in détail, please
Говорят что ямочка посередине свидетельствует о высокой чистоте полученного жёлтого металла.
thank you for your nice video
Сразу ЛАЙК!!!
Portland Cement , then Lead
Great video👍but one thing please get a camera stand
I will
what the name of audio treck?
Тыбурций Драб GOwl
is on youtube? link please. Can't find it by name. Thanks.
soundcloud.com/owl-tech/gowl
know is this technique dangerous for your health? (breathe the smoke) and this technique does not need chemicals (nitric acid, etc.). The gold you get is 999.9% pure gold. thank you and good evening.
If you breath the smoke this could be one of there most dangerous techniques out there, just like inhaling acid fumes or falling into a volcano! So NEVER breath the smoke, inhale the fumes or step in the lava! For cupellation you don’t need acids, but you may need other chemicals like borax, Portland cement, sodium nitrite etc. The purity of the gold you get depends on the metals your gold is alloyed with if there are other PM in the alloy they will remain with the gold, if only base metals are present with the gold those skilled in the art can achieve 99+
Ciao ma che metallo era rame
No, era il refinamento di Oro usando piombo in un cupella di cemento di Portland.
You Really went out your way, to give us all facts about your gold burn. Is that Portland cement or some other cement or mix and is the metal your adding Zinc or Lead and that's how I would do it. By adding Borax near the the end, of the burn.
Did he add borax near the end
according to the translation portland cement
Yes. I added borax at the end.
Amazing .. 👏👏👏
ahmad osmardhani Thank you!
Excellent
Glad you liked it!
Great video!
Glad you enjoyed it
Gold lovely gold ;)
А что за горелка у тебя? пропановая?
да
nice tune dude
Thanks!
Лайк конечно .......кроме свинца и золота еще что нибудь добавляли ?? для купелирования золота вроде серебро не нужно , серебро лишь для палладия и платины
нет
كانت الكميه كثيرة
go .. go ...go ..go..go
The music beat rocks for real... gets me determined to refine my own stash of gold.
Как узнать что весь свинец выгорел
Все почти просто
Можете посоветовать литературу
Nice video idol
👏👏
Why the hell can't you center the camera?
Sorry need another set of arms
Who has class 12 boards on Saturday??
لكن اين ذهب النحاس
Into the cupel
👍👍👍👍
👍
Круто, ЛАЙК!)))
Спасибо :)
+++++
الله يطيح حظك مقطع طويل ومابيه حظ
ههههههه
More explanation, less crappy music.
I'll keep that in mind for future videos