| 摘要 |
1294514 Brightening clay or blanc fixe SANDOZ Ltd 11 Sept 1970 [12 Sept 1969 15 July 1970] 43543/70 Heading C1A [Also in Divisions C3 and D1] China clay or blanc fixe are brightened by mixing a suspension thereof with a solution of a preparation comprising an anionic optical brightener and a poly(amide amine) (see Division C3], washing, drying and pulverizing. Use.-Filler for paper. |
