Put a finger down if you’ve come across a ‘Rice Purity Test’ video on TikTok. Purity tests first gained popularity in the 1980s as a way to test the taker’s innocence, and the Rice purity test is one ...
Earlier, people depended on touchstone tests or the local jeweller’s word. Those methods were quick but not always accurate. Today, most stores and manufacturing units use XRF machines, which check ...
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