| 摘要 |
<p>Composition contains a mixture of water soluble rare earth metal salts (esp. sulphamates e.g. didymium sulphamate) having following % by wt. of metal based on total wt. of metals: La 40-50%; Ne 30-40%; Pr 5-15%; Ce + Th less than 2%, a carrier therefor and a perfume. Optional ingredients are bacteriostats, lyotropic salts different from those above, cationic wetting agents, propellants and alcohols. The rare earth salts are suitably prepd. by reaction of their carbonates with sulphamic acid.</p> |
