2022年6月11日 · simple,stainless steel do noy react to the acid test,one exception,some jewels are made of 316l type of stainless,it stayes on the 18k acid,on the 22k if you wait a couple of minutes it will start to fade but with a gree yelow color very bright, simple real white gold is yelow gold so when you take your acid test on white gold,your scratch mark ...

2012年1月14日 · What is platinium acid? I do not think you can test siver with that. Read the tread and learn to test silver. 4 minuts after you becom a member you alreaddy ask your first question. Try to find your answer your self, and if you can not do that we will proberly help you. Henrik

2024年9月29日 · A bright green reaction indicates gold plate on copper or brass. A pinkish cream color indicates gold plate on silver. Test to distinguish gold carat values: File a notch in the piece to be tested. Apply a drop from Bottle #1. Ten carat gold will show a slight reaction, over 10 carats, little or no reaction. Apply a drop from Bottle #2 ...

2008年6月11日 · The color of the test for gold will vary with gold concentration. Purple is the most common, with black (actually a dark purple) being extremely saturated. I dip a cotton swab in water first then drip a drop of the solution to be tested on the swab followed by a drop of stannous.

2007年2月27日 · I don't know what the site suggests, but you can get far more reliable results by buying a set of test needles and a touch stone when testing gold. Nitric acid, alone, is best for testing most base metals. I used the Schwerter's solution …

2007年9月13日 · Remember to zero your meter with empty test tube on it in-order to get an accurate specific gravity weight. Weigh 1 ml of the battery acid H2SO4 using the same procedure and you should come up with 1.20 to 1.25 SG per 1 ml. This can vary somewhat due to the charged state of the electrolyte (battery acid) no problem, this is just a relative reading.

2017年8月14日 · Depending on the test and what you are looking for, sometimes the acid drop will go onto the scratched metal (ring, chain...) like when checking for plating, or for silver... but normally to check the karat of the gold, the acid drop goes onto the scratch mark made on the stone by the ring, the scratch mark dissolved in a certain concentration of acid, or the acid did …

2008年12月20日 · The sulfite chemical reacts with the acid and produces SO2 - actually, sulfurous acid, when in solution. When you have excess gold, less than enough sulfite will completely react with the gold and drop it and there will be no free SO2 and, therefore, no smell. When the gold is out, you will have free SO2 and a strong smell.

2009年2月21日 · I have some silver looking tea pots with 800 written on the bottem of it. What is the best way to test silver on the spot. I was told to scratch some material on a gold stone and put 18k salution on it and if it turns milky looking is has silver in it. …

2008年6月2日 · If the streak is a copper color, then it is almost certainly gold plating over copper or some mix of base metals. Depending on the base metals, this may or may not react quickly, or at all, to the acids. As said above, anything that passes the gold streak and acid test, if scrap, should be filed to test for gold filled or heavy plate.