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(11)

EP 3 242 970 A1

(12)

(43) Date of publication: 15.11.2017 Bulletin 2017/46 (21) Application number: 16700665.9 (22) Date of filing: 08.01.2016

(51) International Patent Classification (IPC):  D21H 19/38(2006.01) D21H 19/44(2006.01) D21H 19/58(2006.01) D21H 19/40(2006.01) D21H 19/54(2006.01) D21H 19/60(2006.01) (86) International application number: PCT/GB2016/050042 (87) International publication number: WO 2016/110711 (14.07.2016 Gazette 2016/28)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 09.01.2015 GB 201500376 (71) Applicant: Imerys Minerals Limited Par, Cornwall PL24 2SQ (GB)	(72) Inventors: PRESTON, Janet St Austell Cornwall PL25 3EH (GB) BUTLER-LEE, Gavin St Austell Cornwall PL25 4QQ (GB) (74) Representative: Haseltine Lake LLP  Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)