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Is there any tell tale sign for the end point of the cupellation process? We normally run cupellation for nearly 14 to 19 minutes, depending on the previous result those time could change, by comparing result from the check gold sample, two check gold and ten samples at each section, and temperature at 1050 degree Celsius. After the cupellation, switched off the furnace, allow them to reach 870 degree Celcius. But at certain time, three or four times in each day, we never let the temperature to reach 870 degree, and download the cupel at 1000 degree celsius. Will this premature download effect the result?