The testing process gold from gold bouillon is very necessary, in which the gold content so that the results we obtain can be seen the most of what percentage of karat or purity levels of the value contained in the gold metal.
How to do metal gold testing, In the process of testing the gold, there are several methods that can be used, ranging from gold assay methods in a simple way to use chemical solutions to using digital tools.
Several types of testing processes such as methods Touchstone testing, Acid testing kits, Electronic gold testers.
How to do metal gold testing, In the process of testing the gold, there are several methods that can be used, ranging from gold assay methods in a simple way to use chemical solutions to using digital tools.
Several types of testing processes such as methods Touchstone testing, Acid testing kits, Electronic gold testers.
Touchstone testing is the testing of gold by using a textured black
stone and is very light or even with the slate. In testing this gold
requires an acid to see references from the gold content being tested.
The way the test is to rub a gold metal on black stone, so it will look a
yellowish colored scratches scratches from gold or small deposit of
gold on the surface of the touch stone then do the same with a known
gold item, apply a small drop of the test acid to each mark and observe -
compare the reaction of the acid and repeat the test with a different
Karat acid until a match is observed.
Remember to test a fresh portion
of the mark as you don't wont to cross contaminate the test acids. This
method is best suited for known items of gold that are not hallmarked
and you just really need to determine the Karat or purity of the gold.
Touchstone testing compares how gold alloys of known and unknown
fineness react to acid. For gold, the test is based on the fact that 24K
gold resists all but the strongest acids. The purer the gold (the
higher the karatage), the stronger the acid required to change its
character or to dissolve it.
Acid test kit is a method of testing by placing a small drop of acid to
the surface of the item, sometimes it is required that you scratch the
test surface in an inconspicuous place to be sure your not testing a
gold plated item, this can be done with a pocket knife or small file.
By breaking the surface of the metal the acid will give a more accurate result. Place a small drop of acid directly on the scratch starting with theAcid gold test lowest Karat acid first e.g.9kt.
Observe the reaction and compare to a colour reference chart that is usually included, repeat the test with a higher value Karat acid if necessary until a colour match is found. Genuine or solid gold will usually leave a brown stain and non gold items will leave a green stain on the metal or react by bubbling and sizzling indicating that the item is either gold plated or contains copper as a base metal.
Rinse the test item in clean water to remove any excess test fluid, any light staining left behind can be easily removed with a pencil eraser or buffing wheel. Always exercise caution when using Acid Testing Kits and be sure to read all safety information provided with your kit, acid is very corrosive and toxic. Acid testing is probably the most widely used of all the gold testing methods. A selection of different Karat acids are formulated to react in different ways when they come into contact with genuine gold items of a certain Karat
By breaking the surface of the metal the acid will give a more accurate result. Place a small drop of acid directly on the scratch starting with theAcid gold test lowest Karat acid first e.g.9kt.
Observe the reaction and compare to a colour reference chart that is usually included, repeat the test with a higher value Karat acid if necessary until a colour match is found. Genuine or solid gold will usually leave a brown stain and non gold items will leave a green stain on the metal or react by bubbling and sizzling indicating that the item is either gold plated or contains copper as a base metal.
Rinse the test item in clean water to remove any excess test fluid, any light staining left behind can be easily removed with a pencil eraser or buffing wheel. Always exercise caution when using Acid Testing Kits and be sure to read all safety information provided with your kit, acid is very corrosive and toxic. Acid testing is probably the most widely used of all the gold testing methods. A selection of different Karat acids are formulated to react in different ways when they come into contact with genuine gold items of a certain Karat
The electronic gold tester is a relatively new addition for the scrap gold dealers toolbox, briefly it consists of an electronic circuit and a test plate of reference gold all housed in a neat desktop size box.
Electronic Gold this assay is very easy to use in testing gold, quickly and efficiently detects karat value of the gold from 6 to 18 karats. Also detects platinum and separates solid gold items from gold plated ones. Provides a numeric reading on the LCD display that corresponds to the karat table.
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Electronic Gold this assay is very easy to use in testing gold, quickly and efficiently detects karat value of the gold from 6 to 18 karats. Also detects platinum and separates solid gold items from gold plated ones. Provides a numeric reading on the LCD display that corresponds to the karat table.
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