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# Search for copper in Topics

### Soldering copper to copper?

I'm just starting out but most of the instruction I've seen on soldering (jewelry) talks about flux, the solder itself, and a torch or soldering iron. When soldering copper to copper is there a special flux and solder to be used so that the solder doesn't look "silver"? Does it matter whether you use a torch or a soldering iron?

### Copper flute?

I live in estonia. No bamboos here. So I was thinking to use copper tube. I find this http://www.aflauta.com.br/hist/bamboo.pdf Problem is inside diameter and wall thickness. If i'm getting it right for every key is right inside diameter and lenght  I can buy straight copper tubes/pipes: 15mm(outside diameter) x 1,05mm(Wall thickness)  1,05x2=2.1mm 15-2.1=12.9mm(inside diameter) 18 x 1,0 1,0x2=2 18-2=16  12 x 1,0  1,0x2=2 12-2=10   10 x 0,8 2x0,8=1,6 10-1,6=8,4 Whats the best? I was thinking to use 15mm and 18mm tube 18mm for key a 15mm for key d I ended up with 15x1,05 copper tube. Thinking how to use this: http://11wall-west.com/~ph_kosel/flutomat.html If I use this measures http://www.phy.mtu.edu/~suits/pvcflute.html I get 7.2mm for blow hole and 6mm for finger hole. My tube I.D is 12.9 Is there any flute calculator that calculates hole sizes for right key? I am also thankful for any flute related help what helps me to make copper flute.

Topic by DeathSuperMario    |  last reply

### how to extract copper from copper grease?

I mixed copper grease and oil or water i forgot and i saw the little speckles of copper how do i extract them?

Question by sharlston    |  last reply

### Drilling on the copper chips?

Hi, I'm asking about how to drill on copper or silver chips? I mean if there is material or chemicl help to drill on copper or silver chips to write on it or to draw. in other words how to draw or write on copper or silver chips, pls help thanks

### Soldering copper question.

I'm working on a project that requires soldering a 1/4" OD copper tube into a hole drilled in the side of a 2" copper pipe. Will a soldered join (not brazed) be sturdy or do I need to do something to reinforce (cut threads into the tube and pipe, flare the tube and insert from inside, etc) it? There won't be a lot of stress on the join but there will be a small tap on the tube to there may be a bit of torsion now and again. Thanks for your responses!

Topic by Mr. E Meat    |  last reply

### Copper Crystal Metal

Hi, Please assist. I am looking for ways to create copper crystals from copper sulfate liquid by using chemicals only. I found a company in South Africa that's doing exactly that.

Topic by CrystalCopper    |  last reply

### Copper inlayed wood

Hello, I'm new to working with wood, and I want to find a way to inlay pieces of copper into small pieces of wood. Can someone explain how I might do this. I want the copper pieces to be flush with the wood, and I like an element of spontaneity, so I'm wondering if its possible to pour molten copper into a crevice on a piece of wood. If it's not how can I at least get the piece of copper to stick into the wood? Thanks for any thoughts.

Topic by kpryce    |  last reply

### Ceramic Mold and Copper? Answered

I'm in ceramics at my school and i was planning to make a lantern and wanted to make a handle for it. I was thinking of making a mold out of white talc and getting it fired. Then putting copper in the mold and firing it again. Is this idealistic, or better yet would it work?

Question by Klaudiuszm    |  last reply

### toxic copper fumes

I have made a tabacco pipe out of a brass bowl and a copper pipe that fits into the bowl. i have heard that copper gives off toxic fumes. will it do so if it is burning in the brass?

Topic by Nitrate495    |  last reply

### Will copper pipe work?

I want to make one of those pipe swords and I want to know if one of those copper pipes you use to move water around your house would be strong enough?

Question by Freerunner    |  last reply

### repairing a separated copper

I was assembling a 3D Xmas Tree from Velleman-Kit when one of the pads come off the board. Is there a way restore the connection so that the kit will work?

### what is this copper container? Answered

I am going to AJ2013 (23 australian jamboree in maryborough) and i need to raise funds to pay for entry. i have been looking through the cupboard trying to find things to sell. i remebered this which i bought for \$15 at a garage sale a few years ago. if anyone could help with identification of this and how much money i could sell it for that would be awesome. it says that it is quell fire fighting equipment, automatic, and made in 1957. it is a copper tank with copper rivets, a brass screw lid and rubber hose with brass fittings. my estimate on the capacity would be about 9 liters/2.5 gallons/20 pints. i think that you are meant to hold it upside down and the weight of the water pushes it out the nozzle. i dont know if that is right because it doesnt come out very fast.

Question by RedScoutMonkey17    |  last reply

### Making Copper (II) Chloride From Acid and Copper

Topic by John Smith    |  last reply

### how to repair a copper kettle?

I have bought a copper kettle through ebay, but found that it has a split seam which leaks at the bottom of the spout. I cant solder it as solder is lead an not safe for consumption. Any advice would be welcome, thanks.

### Conductivity of heat through copper?

I have a piece of flat copper, 150 mm X 30 mm X 1mm thick. I put 50 watts onto one (150 mm) end, how much arrives at the other? so: Surface area: .00015 m2 Distance: .03 m thermal conductivity copper: 400 W.m-1.K-1

Topic by SolarFlower_org    |  last reply

### Salvaging copper from transformers?

I am trying to salvage copper wire from transformers. I get these tranformers from old elctronic waste. I wondered if anyone had suggestions or thoghts about doing this. Has anybody on here done this? Thanks

Question by nurdee1    |  last reply

### Copperplating with non-pure-copper?

Hi! I plan on some experiments with a modified method i saw here for PCB-plating with copper to make the holes conductive. Now the question: What if my metal is not 100% pure but has some impurities in it? Does it still only "transfer" the copper and leaves the impurities as slag behind? I think it should be this way, since a similar approach gets used in refining metals to a very high purity; but i am unsure... Lets say i do: Follow the basic recipe (with smaller ammounts!) @ http://www.thinktink.com/stack/volumes/voliii/consumbl/cplatmix.htm and use copper sulfide. I think the trick now is that only copper-ions get disolved in the copper sulfide and nothing else. Those ions become plated to the other pole and thus i get purest copper plated to it?

Topic by Orngrimm    |  last reply

### Copper pipe project ideas?

I have a 3' piece of 1/2" copper pipe, have any project ideas?

Question by superlukie17    |  last reply

### Creating copper nano particles

Be it conductive ink, decorations or just a special pigment for your paint project, Copper is nice.Only problem is grinding this soft metal fine enough to be of any good use.A not so well documented feature of food additives is that they often have "unwanted" side effects.In our case E300, Ascorbic Acid or just Vitamin C.So how to make copper nano particles with it you might wonder?Prepare a well saturated solution of Copper Sulphate, you find the blue crystals in the gardening section together with fertilisers.It is best to use destilled water and not plain tap water, if in doubt go at least with the demineralised stuff for batteries.Adding E300 either dissolved in water or directly as crystals will start a nice reaction.The copper solphate is reduced back to metallic copper.There are a few problems though...For best results you need a saturation copper sulphate solution, low temperatures and a magnetic stirrer.This produced the finest particles for me at around 5°C.But even warm or at room temp the constant sirring is beneficial for even particle sizes.The ascorbic acid is used up in the process as well.You can start with a little and see how much you end up with in terms of a layer of copper particles at the bottom.Adding more E300 will cause a "rain" of fine copper particles - once this no longer happens you know the copper sulphate is used up as well.A dark greenish color of the solution will indicate this as well.Getting the copper out of the glass...Keep in mind the copper is extreme fine!As long as it stays in the solution it won't oxidize or otherwise react.Once out and in contact with just water and air oxidation happens quickly, after all it is pure copper...I found removing the watery solution and then adding destilled water to repeat the process is a good start.The waste from the first round can still be usefull though...In the final round I try to remove as much water as I can and then add methyled spirit to prevent the reactions.You can use oil as well or do a quick vacuum drying and store it in a sealed and oxygen free container.What to do with it?As a condictive paint with the right binder it only needs some rubbing with a smooth tool to create a conductive cover with a low resistance.In a clear paint or resin it provides some stunning color effects.You can even dust the dry powder onto a freshly painted surface to get a copper look.Leave without a top coat and you quickly get an old copper or even green look.If you ever wanted extreme fine metal particles you will come up with more ideas...Like shielding or sintering....

Topic by Downunder35m    |  last reply

### Paint Plastic To Copper Tubing

I'm making a prop that requires a length of coiled copper tubing & I don't have the cash to buy it. I need a plastic tube that is malleable into a coil & I can spray paint it a copper color. I've experimented with some types of plastic cover electric cord & aquarium tubing & both, the plastic reacted with the paint & never dried.  I need to know what types of plastic tube I can ether paint myself & wont melt the plastic, or point me in the detection of were I can find copper colored plastic tubing, or name the types of plastic tube that wont react to certain types of paint.

### copper wire vaporization with a candle ?

Hi !This morning, I was wondering what was the maximum temperature of the flame of a simple candle.So, this evening, despite the answer is on the internet, I made some quick and various experimentations of my own, mainly because there was nothing interesting at TV ...I put a wire of tin with a diameter of 1 millimetre over the flame and it liquefied immediately. So I immediately deduced the temperature of the flame was over 505oK ...Then, I tried with a wire of iron with a diameter of 1 millimetre, and it did not liquefied. So, I deduced the maximum temperature of the candle's flame was below 1811oK.Then, I tried with a very thin wire of enameled copper (thiner than a hair), the enamel vaporized in a flash and the copper wire quickly liquefied. I deduced the max temp of the flame was over 1357oK.This gave me a maximal temperature somewhere between 1357oK and 1811oK.Then, I tried with a thin wire of copper (0.2 millimitres), and it liquefied. But I also noticed that, sometimes, there was a green flame adding to the candle's flame.On the internet, they say that coppers flame are green. This would mean that my candle's flame is hot enough to vaporize my copper wire ? and, thus, that the maximal temperature of the candle flame is over 2835oK ?????If so, why can't it liquefy my 1 millimeters iron wire ?=o/

### How to straighten copper tubing? Answered

I'm making an air "cannon", but my tubing is bent. It is 3/8 copper tubing, and is very bendy. Is there a way to get it straight, or am I better off buying a small steel tube? (I did try googling this, with no helpful results)

Question by Bartboy    |  last reply

### Gossamer Falls Copper Works

Any body know how to make a Gossamer Falls Copper Works Will sombody of a How to...?

Topic by kjvman    |  last reply

### Faster electrolysis of Copper Sulfate?

I'm trying to make copper powder and I know it can be done by electrolysis of copper sulfate solution with copper electrodes. The way I have to right now it's extremely slow so I was wondering how I could speed things up a bit. Im not using a power supply only a 20volt drill battery (because it turned out to work better somehow)

Question by CameronP33    |  last reply

### Copper and magnet electricity generator

For a project in school we are designing a simple electric generator using copper wire and a magnet. The output i'm aiming for is 15V .The fixed criteria for Faraday's law as followsE =( NBA ) / T T= 3 seconds N = adjustable A = adjustable B = Neodymium 1.32 T so how do i chose my copper wire? what diameter? what kind? how do i keep the design not so BIG . How do i increase my voltage output by using a double coil system?

Question by CharithH4    |  last reply

### Copper tape for thermal concentration

Has anyone ever used copper tape to concentrate heat on an object to obtain a uniform higher temperature?   I've been doing some studies in the recent past that suggest polished copper foil is a good reflector of infrared energy. It is not as good as silver, but I don't think it would go over well to use silver in any sort of oven or kiln.  I used to think good ole aluminum foil was good for heat, but it turns out it is only good for stopping heat.  I've thought of using the instructable on the waffle iron or make one by way of a bread toaster, but will most likely not be able to go through with it.  The copper foil is the same type found at stained glass craft shops.

Topic by jmikronis    |  last reply

### Soldering Copper Round Bar

I plan on making a backdrop (pictured) out of copper. I have a little bit of experience soldering copper pipe. I have an idea of how to build the backdrop but would appreciate some feedback/tips.Dimensions:- 5' W x 7' H x 3' DMaterials: - Diagonal members: 0.1875" round bar- Circular votive holders: 0.125" round bar- Rectangular border, kickers, and base: 1/4" x 1" rectangular barI'm thinking that I will solder the diagonal members at each intersection and where the ends meet the rectangular bar frame. The base will be a 3' rectangular bar on the left and on the right. There will be a kicker on each side, connected to the base and about halfway up the vertical members of the frame.Does this seem feasible? Will the structure be stable? How can I form the circular votive holders?

Question by sjung510    |  last reply

### what can I do with copper sulfate besides copper plate things? Answered

I was cleaning my room and found remnants of a chemistry set. any ideas

Question by vince 09    |  last reply

### I need some copper disks

I need several copper disks 2 inches in diameter with a 3/4 inch hole in the center. They can be cut, stamped, or otherwise constructed but it needs to be out of 1/16 inch copper.  several means 5-10

### how to remove copper from motor?

I was wondering how to remove the copper from an air conditioning motor.  It is wound around the metal in several different places, and has a heavy papers inserted into each hole where the copper is looped/  The only way I have found is to take a screwdriver and pound each  hole with a hammer to push the copper out.  I was wondering if anyone had any suggestions.  Trying to scrap several motors of there copper.

Question by tweetygirl0612    |  last reply

I have an old house that uses steam heat and has big, single-pipe, cast-iron steam radiators.  I wanted to replace one of them with something modern looking, and one company sells such radiators, but they are very expensive (sold here http://steamradiators.com/) My question is, can I make one of these  out of large (1.5" or so) diameter copper pipes, soldered together in the same fashion?  I've read that steam systems typically operate at 1psi of pressure, which sounds like it's well below the safety limit of copper pipes and solder joints. I think it would look fantastic, but would it work?

Topic by mhj555    |  last reply

Hi! I think i will see some PCB-Etchin in the future... So i will need an etchant. Aequous copper chloride was the choice i made since it is a regenerative etchant according to several sources. Now if i understood the chemistry right (Sorry... electrotechnician here), the reaction in theory only needs the oxygen from the peroxide (H2O2) and the hydrogen isnt used at all? Since i only have relatively weak peroxide, i plan on using a bubbler to introduce the oxygen to the copper-HCI-mix. This because i dont want to dilute the acid too much... Will that work? I know that if i use normal air (which has only around 20% oxygen in it) it will take some time... But would it work in the first place? I read somewhere that copper and muriatic acid dont really react in the first place... So if i also understood that right, it needs the oxygen present in the beginning to START reacting... So i think i may go with a contraption like: Plastic container with a bubbler installed (Pumps normal air) Add Muriatic acid to the container Add copper to the acid let it bubble till the copper is disolved Now i have a copper chloride-solution which i can regenerate by adding oxygen (By bubbler or H2O2)?

Topic by Orngrimm    |  last reply

### Is the copper on electric wire negative or positive?

On elecric wire there are two kinds of metal. One is copper and the other is iron. Okay, now on a battery there is the positive side (+) and the negative side (-). Wich wire goes where?

Question by Potaterchip    |  last reply

### how to stripplarge copper wire effortlessly

I have about 100 pounds of electrical copper wire, and I need to strip it for scrap I was wondering if anyone out there has a quick easy way to strip the wire with a power tool? would a dremel with a cutter do the work.

Topic by renaye    |  last reply

### what happens to quarks in copper atoms when electricity is ran trough copper wire? Answered

I want to know because I have always wonderd this

Question by nerd7473    |  last reply

### i have a large copper cylinder with copper pipes and fittings any ideas for a piece of sculpture?

Its two foot tall, it has already built inlets and outlets, also a copper screw top to allow heating element to be placed inside, i also have copper fittings

Question by patrick murray    |  last reply

### how to make uv sensitive copper cladding board from normal copper cladding board?

Question by nklharish1    |  last reply

### how to make an engrave plate out of copper?

How to  make an engrave plate out of copper?

Question by smoke_d8    |  last reply

### how can i make copper carbonate? Answered

Hello , am trying to get a hold of some copper carbonate but its much too expensive. now i have some raw, and untarnished (beyond normal anyways) copper laying around and want to know if theres any way i can convert this into pure copper carbonate, with minimal impurities such as copper oxides and such. is there a way to do this through electrolysis perhaps? also, is there a way to convert copper and copper oxide to copper hydroxide which i can simply add carbonic acid to to copper carbonate? also whoever answers my question will get a best anser form me , guaranteed

Question by oldmanbeefjerky    |  last reply

### Remove copper from a PCB without dissolving it?

I have a bunch of old PCBs laying around from various electronic projects, things I took apart and re-purposed, etc...Seeing as copper is roughly \$0.25 per ounce, I would like to remove the copper from these PCBs, and sell it to a local coin shop that buys various scrap metals. I plan on sanding the solder mask off first, but after that, I don't know how to remove the copper from the fiberglass. Maybe just electroplate it onto another piece of copper? Please give me suggestions, thanks!

Topic by metrogdor22    |  last reply

### how to strip large diameter copper wire

If you have say 2 inch or better diameter copper wire to strip here is what I do. I have ben in the scrap arena for years. Buy a large handeled pair of shears that are only for copper. They will look much like a large pair of boltcutters. Cut your insulated wire into about two foot lenghts. Get a large pot, the bigger the better and heat with an out door propane burner full of water. Place the cut sticks of wire into the boiling water fro about five min. Get some insulated rubber gloves and a sharp razor knofe and you will find that the plastic insulation carves away like butter. This works on everykind of insulated wire I have come across. With lead wrapped insulated wire, get a plasma torch. It cutts easily and is so fast the plastic wire inside does not have time to catch on fire. Use plenty of ventilation to avoid breathing lead based fumes.

Topic by beserker    |  last reply

### How to strip cables to free the copper inside?

E-waste collectors in countries like Ghana collect cables and then burn them to get rid of the plastic and then sell the copper. This process is not environmental friendly and harms their health. I'm working on a project to find better ways to treat imported e-waste. Is there a better way to strip cables that would not imply burning, and that would respect the worker's health? Thanks!

Question by rf.font    |  last reply

### Does Chromesteel disolve during copper-electrlysis with Coppersulfate?

Hi I want to refine some copper and change it to copper-dust-particles by means of copper-electrolsis in a bath of disolved coppersulfate. Since my copper is in smaller bits id like to have some sort of etallic basket to hold the scraps. I think i would like to go with a chromesteel-mesh i connect to the power. The mesh/basket contains my scrap-copper and the anode-sludge can pass thru the basket... The basket (anode) and the copper-cathode are connected to the powersupply. Now my question: I think the chromesteel shouldnt get disolved as long as i dont crank up the voltage too high or let it run without sacrificial copper at the cathode. If i would do that, it would start to split the water used in the solution and produce H and O. Bad. Also would slowly eat away the metals too. Bad^2 But as long as i have copper to be disolved at the cathode, it shouldnt do anything to my chrome-steel-basket, right? Thanks for inputs from someone who knows it better than i do :)

Topic by Orngrimm    |  last reply

### Removing chlorides from a solution to leave only metallic copper?

I'm trying to deposit metallic copper into a piece of wood and i'm doing it with a solution of copper chloride (the alternative pcb etchant to the ferric stuff). I want to deposit metallic copper into the wood where it has soaked in and remove the chlorides altogether. Bearing in mind that i don't want much in the way of another solution, how could it be done? Could I drop in some lead to precipitate out the chloride ions or is there something else that would steal the chloride ions from copper that wouldn't be too hard for a hobbiest to obtain?

Question by The Ideanator    |  last reply

### He mentions using a laser printer for copper etching, can I use my ink jet printer and get the same results? Answered

He mentions using a laser printer for copper etching, can I use my ink jet printer and get the same results?

### While doing electrolysis on some pennies, (Pence?) I noticed a copper coating on my + copper lead?

Is there something special about this? Also, Is this a form of electroplating? I doused some pennies in vinegar for about a week+ and tried this. On a thinner, magnet wire lead, (copper +) it had what I beleive is a dark green copper salt, that burned blue. Can anyone Identify this? Also, I changed the diameter of the lead, to about 1/16 - 1/8 (Copper lead, +) and It seemed like that lead was powder coated with copper. Is there a reason it would not be a copper salt? The other was coated with what I think is Zinc.

Question by PKTraceur    |  last reply

### How much copper will 1lb of Ferric Chloride dissolve?

How much copper will 1lb of Anhydrous Ferric Chloride dissolve? How much water does the Ferric Chloride need to be dissolved in? Thanks

Question by arthur92710    |  last reply

### Is there a clear top coat that will bond to a copper penny floor??

We are in the process  of laying a copper penny floor in our entryway. Is there a clear coat for the uppermost layer that will bond to the pennies, and stand up to foot traffic and cleaning? Thank you for your time and consideration!

Question by laurel1020    |  last reply

### Does anyone know what causes this effect in a copper pipe? Answered

When you view light through a copper pipe you see all these neat rings I wondered if anybody knew why. Thanks

Question by nurdee1    |  last reply

### where can i find pure copper and zinc strips?

I need several strips of copper and zinc for a science project but its frustratingly hard to find zinc anywhere in the Seattle area. I have already tried the local electronics store and plumbing store. Can you guys suggest anything not outrageously expensive and within an hour driving distance?

Topic by Plastic Fir    |  last reply