Originally Posted by
hijacked
Depends on who you get it from. Ive received it both ways. The stuff that Ive received recently is sandy/salty like you explained. You are good to go. You can do a melting point test with a $50 infrared temp gun. Very quick and easy to do this way. The think the oven tests are very inaccurate. Take a pinch and put it on a flat black surface. A cast iron skillet works well. Turn the heat on, aim the laser at the pinch of powder, as soon as it melts note the temp on the digital read out. These gus dont work well if there are reflective surfaces near the powder. So you cannot use aluminum foil or a spoon. If you hold the gun the correct distance away, this method is accurate within 5 degrees. Especially if you are increasing the heat slowly.
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