| 摘要 |
PURPOSE:A composition that is obtained by adding copper sulfate to alum, thus showing preserving and deodorizing actions. CONSTITUTION:Alum, preferably potassium alum, ammonia alum or sodium alum, especially burnt alum, is combined with copper sulfate in an amount less than 20wt%. Both components are dissolved in water at a certain ratio to prepare an aqueous solution or the solution is evaporated to dryness into a powder or granules. The resultant composition is used to remove bad smells such as ammonia and is suitably used to treat paper, woven clothes and timbers, because it has flameretarding action. |
