Washing process and washing apparatus
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United States of America Patent
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Jul 22, 2003
Grant Date -
N/A
app pub date -
Apr 4, 2002
filing date -
Jan 22, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Washing items are washed simultaneously with softening washing water comprising alkali metal ion and at least one of carbonate ion and bicarbonate ion. The washing water before being softened is obtained by electrolyzing an aqueous solution of sodium hydrogencarbonate having a pH of 9.5 or more and an electric conductivity of 150 mS/m or more. The softened washing water has a total hardness of 40 ppm or less.
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