| 摘要 |
<p>An aqueous redox amplifier composition comprising a colour developing agent, hydrogen peroxide or a compound which provides hydrogen peroxide and a hydroxylamine compound of the formula: <CHEM> or a salt thereof wherein R<1> and R<2> are each a substituted or unsubstituted alkyl group of 1-4 carbon atoms and wherein the concentration ranges are: hydrogen peroxide from 0.5 to 10 ml/l (as 30% w/w solution), hydroxylamine compound from 0.5 to 15 ml/l (as an 85% solution of diethylhydroxylamine), and wherein the pH is in the range from 10.5 to 12.</p> |
