Filtering impurities from rock salt. The natural rock salt has been ground and dissolved in warm water. All of the salt, sodium chloride, dissolves, leaving a suspension of mineral and organic impurities. These are filtered out in the filter funnel. The liquor that is collected is then evaporated leaving only the pure crystalline salt behind.
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Creative#:
TOP15985938
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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