| 摘要 |
An aqueous redox amplifier composition comprising a colour developing agent, hydrogen peroxide or a compound which provides hydrogen peroxide and hydroxylamine or a salt thereof wherein the concentration ranges are: hydrogen peroxide from 0.5 to 10 ml/l (as 30% w/w solution), hydroxylamine or a salt thereof from 0.25 to 5.5 g/l (as hydroxylamine sulphate), and wherein the pH is in the range from 10.5 to 12.
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