| 摘要 |
<p>The invention concerns a composition based on a rare earth sulphide with improved chemical stability, its preparation method and its use as colouring pigment. The inventive composition is characterised in that it contains a rare earth sulphide support and a layer based on at least said rare earth sulphide salt, a hydroxide, an oxide of said rare earth or an oxy and/or hydroxy derivative thereof, the salt, the hydroxide, the oxide and the derivative being insoluble in water and/or in alcohols. Said composition is obtained by acid attack of said support surface optionally followed by neutralisation.</p> |
