What is the best composition for rose gold solder, 14K and 18K?
464471
This would depend on the carat of the rose gold you are working with .Everywhere from 9K to 18K is available.  There are different colors also of this type of gold, some of the solders sold will be too red and you will need to tone it down. I have heard it is very difficult to work with on its own as it does not flow easily. If you are trying to make rose gold solder what I do know is that it is the copper in it that gives it the red color. Different manufacturers have different colorings it is not always uniform.\nYour question is a little confusing as I am unsure of what you are trying to accomplish. If I can come up with more information for you I will edit this listing. Good Luck
223614
copper and aluminum are best electricity conductors. I would say lead, since it's one of the densiest material out there. Heat is caused by vibrating atoms, denser material means the atoms are closer, and it's melting point is low too. As soon as you touch it with a hot soldering iron, the heat transfers right away and melts it.
287250
It's "carats". 24k gold is pure. 18k gold is 18 parts of gold with 6 of some other metal, silver, or copper to alter the colour or make it wear harder and last longer, 9k is 9 parts of gold and 15 of other metals.
169774
I use a torch with MAPP guess whenever I solder copper pipes.  For welding iron, I use a MIG or arc welder.
389575
GOLD-PLATINUM-PALLADIUM TEST\nBy Delos Toole\n\nSelect ore samples suspected to contain Gold-Platinum-Palladium and use concentrates equal to the size of one navy bean or pea. Place the concentrates in a clean test tube and add 1cc Nitric Acid and 3cc Hydrochloric Acid, (this a solution named Aqua Regia which is used regularly when testing.) Boil this over a lamp flame for about 5 to 8 minutes. Should this Aqua Regia solution contain Gold-Platinum-Palladium then the following tests will react with various colors, (good idea to practice on known samples of Gold-Platinum-Palladium for color and reaction identification and become familiar to them.)\n\nTest for Gold (Au).\n\nPrepare a solution for Stannous Chloride for each 8 hour period as this solution does not hold up under extended time periods. Dissolving Metallic Tin (Sn) in Hydrochloric Acid (HC1), where the resulted solution will be called Stannous Chloride (SnC1). Place about 2cc of HC1 in a clean test tube and add 1 or 2 small bit pieces of Metallic Tin to the test tube and bring this to a slight boil. You now have Stannous Chloride (SnC1).\n\nNow begin the gold test by making a spot test with freshly made Stannous Chloride by placing a piece of filter paper onto a clean piece of glass and place one drop of Aqua Regia solution in the center of the filter paper, and then add to this mixture one drop of freshly made Stannous Chloride solution. If gold is present there will show up on the filter paper a purple or rose colored spot when the filter paper has dried; the darker the color the more gold will be present; for low grade ore the spot color will appear plainer. Should the filter paper dry out completely, then add 1 more drop of Stannous Chloride solution to the filter paper to bring out the color.\n\nBegin the test for Platinum (Pt) by placing 20 drops of Aqua Regia solution onto a clean porcelain evaporating dish and boil this over a lamp flame until it is dry, then allow this to remain over the lamp flame for about an extended one second.\n\nPlace the dish where it can cool for a few minutes so as not to break the dish. After cooling, place 4cc of distilled water, (or water free from Chlorine), and reheat just to the boiling point. Filter this solution onto another clean porcelain evaporating dish. Add to this dish, Potassium Iodide equal to one grain of rice. Warm this solution slightly over the lamp flame and observe the color that appears. The results for this test will show if Platinum (Pt) is present as the solution will begin to turn to a light or dark rose color within a few minutes time.\n\nThe more Platinum present in the solution, (ore sample), the quicker and darker the color will appear.\n\nSulphides and other impurities, most likely will give a red color to the solution and will be mistaken for the rose color, if so, then boil off about one-half of the solution to quicken the evaporation process. Then let the porcelain dish set until completely dry, then add a few drops of clean plain water, (no chlorine water). The result will then be a bright rose color, and should there be Sulphides or other impurities in the solution they will appear as colorless. If this solution should appear red, then add a few cc’s of plain water to dilute the dark rose color to a lighter rose color, then you have Platinum (Pt).\n\nTesting for Palladium(Pd).\n\nIn the test for Platinum (Pt), upon adding Potassium Iodide (KI) and warming the procedure, if Palladium (Pd) is present in the sample ore, the solution will turn a dark color or black, which depends upon the amount of Palladium (Pd) present. The more Palladium (Pd) present, the darker the color will be, and also there will be a black precipitate in the bottom of the porcelain dish, which when adding an excess of Potassium Iodide (KI) will dissolve giving a wine-red color appearance.
996090
Well, I don't know how to test for 9 kt gold, but I do know that 8 kt gold and 5 kt gold exist.  Unfortunately I don't know anything about the availability.  The word karat just refers to how pure the gold is.  For example 24 karat is 100% pure, and 18 karat is 75% pure and so on.  So of course it is possible to make 8 or 5 or 13 or 22 karat gold, but I don't think it's very common.  \n\nNow, if you know what other metal the gold is mixed with, and you know the specific gravity of the gold and the other metal, you could probably determine the karat of the gold by comparing that to the specific gravity of your sample and plugging it into the equations.
299132
- Go to Google.com\n- Do a search by typing 'tech hot air soldering filetype:PDF'\n\nNot sure if the results there are what you are looking for.
817407
See page 32 of the PowerPoint presentation at http://www.ccm.udel.edu/Personnel/homepage/class_web/Lecture%20Notes/2004/AskelandPhuleNotes-CH10Printable.ppt,\n\nA number of PDFs are found with the following search http://www.google.com/search?hl=en&lr=&q=pb+sn+eutectic+photomicrograph&btnG=Search
519489
Yes. But it's too soft to really make anything out of, hence the 18 or 10kt.\n\nIf an item is 24 karats, that means the item is 24 parts out of 24 parts, 100% pure. When it is 18 karat it is 18 parts pure gold and 6 parts some other metal used for strength, 75% pure. To calculate purity simply divide the stated karat weight by 24. For example 12 karat equals 12/24, which equals to 50% pure.
1187766
Try these links, they're in order of what I'd recommond and all cary titanium\n\nHope it helps! :)
1172979
Lead II Nitride\n\nCa(BrO2)2
337388
rose gold is alloyed with copper, white gold is alloyed with silver. The karat value of the different pieces would determine their value in a gold market. In a retail market, hallmarking, craftsmanship, and supply and demand would dictate the values of each type of piece.
368567
You might be referring to brass, which has a density of 8.5 g/ml.\n\nBronze with 11% tin has a density of 8.1 g/ml.\n\n\nI would guess the brass, since it is more commonly used.
1048573
White gold is an alloy of gold and some white metals such as silver and palladium. White gold can be 18kt, 14kt, 9kt or any karat. For example, 18kt yellow gold is made by mixing 75% gold (750 parts per thousand) with 25% (250 parts per thousand) other metals such as copper and zinc. 18kt white gold is made by mixing 75% gold with 25% other metals such as silver and palladium. So the amount of gold is the same but the alloy is different.\n\n Traditionally nickel was used in white gold, however, nickel is no longer used in most white gold made today as nickel can cause reactions with some people. We do not use nickel in our white gold
511327
Gold remains gold no matter what. The problem is with the base metals gold jewelry is mixed with. Pure gold is 24 karats. Most of the jewelry you purchase is 14K or 10K. The higher the karat, the more gold. Example, 14K means that it is 14 parts gold, 10 parts base metal (for hardness and color), for a total of 24 parts. Therefore 10K is only 10 parts gold and 14 parts base metal. The base metal oxidizes and changes color. The more base metal (10K) the more likely it is to discolor, become brittle, or break. Touching silver has no effect. Just use a simple cleaner (ammonia and water) or buy a jewelry cleaner. Keep away from bleach, either when cleaning or in chlorinated water. This can do severe damage to the base metals. And do not clean your gold and silver jewelry in the same cleaner. The adverse effect is on the silver, not the gold. Hope this helps.
48891
rosin core solder ia a mixture of lead and tin with a rosin central core thee metals are in a ratio of 60% to 40 % or close to this ratio. This solder is used for making joints in electronic devices since the rosin helps to make the heated metals to flow and make a good solder joint and is non-corrosive. a good solder joint has a shape like a Hershey's Kiss. A poor or "cold" solder joint will be rounded under ar the circuit board level and will have undesirable high resistance. To solder to NASA specs a good worker should be able to make at least one million consecutive joints with no errors. acids are also used as a flux mainly in jewelry work and plumbing, etc. the flux helps the flow of solder.
1091767
Could you use lead solder?