| 摘要 |
Improved cleaning performance, especially as regards the removal of moulds, can be achieved by the use of two separate liquid compositions, a first of which contains an acid or neutral composition which comprises a peroxide and a second of which contains an alkaline composition, said first and second compositions being stored separately and sprayed from a single unit to common point. By ensuring that these compositions are sprayed, either sequentially or simultaneously onto a surface where they react together to produce an alkaline peroxide solution, it is possible to overcome the problems of instability on storage and ensure that the mixed compositions are delivered at a pH at which the peroxide compound is active as a bleaching agent.
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