(19)

(11)

EP 0 821 656 A1

(12)

(43) Date of publication: 04.02.1998 Bulletin 1998/06 (21) Application number: 96910049.0 (22) Date of filing: 12.04.1996

(51) International Patent Classification (IPC):  C01G 49/ 14( . ) C04B 22/ 14( . ) (86) International application number: PCT/FI1996/000198 (87) International publication number: WO 1996/033133 (24.10.1996 Gazette 1996/47)

(84) Designated Contracting States: AT BE DE DK ES FR GB GR IE IT NL PT SE (30) Priority: 21.04.1995 FI 19950001922 (71) Applicants: Finnsementti OY 21600 Pargas (FI) KEMIRA PIGMENTS OY 28840 Björneborg (FI)	(72) Inventors: ERIKSSON, Bo-Erik FIN-10300 Karis (FI) MATTILA, Harri FIN-28400 Ulvila (FI) (74) Representative: Grew, Eva Regina, et al  Oy Jalo Ant-Wuorinen Ab Iso Roobertinkatu 4-6-A 00120 Helsinki 00120 Helsinki (FI)