EP 4290007 A1 20231213 - METHOD OF PRODUCING A DYED PAPER
Title (en)
METHOD OF PRODUCING A DYED PAPER
Title (de)
VERFAHREN ZUR HESTELLUNG EINES GEFÄRBTEN PAPIERS
Title (fr)
PROCÉDÉ DE FABRICATION D'UN PAPIER TEINTÉ
Publication
Application
Priority
IT 202200012278 A 20220609
Abstract (en)
A method for producing a mass dyed paper material by using food dyes comprises the following steps: adding a first fixing agent to a cellulose mixture being stirred; waiting for a first period of time; adding at least one food dye to the cellulose mixture being stirred; waiting for a second period of time; adding a second fixing agent to the cellulose mixture being stirred; waiting for a third period of time; obtaining a dyed cellulose mixture; using the so obtained dyed cellulose mixture to form a sheet of mass dyed paper material. The aforesaid food dye is a solid food dye that is added as it is, or a solid food dye that is dissolved in a liquid formulation, or a solid food dye that is contained in a lacquer.
IPC 8 full level
D21H 17/44 (2006.01); D21H 17/52 (2006.01); D21H 17/56 (2006.01); D21H 17/66 (2006.01); D21H 21/28 (2006.01)
CPC (source: EP)
D21H 17/44 (2013.01); D21H 17/52 (2013.01); D21H 17/56 (2013.01); D21H 17/66 (2013.01); D21H 21/28 (2013.01)
Citation (search report)
- [A] WO 2008096223 A1 20080814 - LECCE PEN COMPANY SPA [IT], et al
- [A] EP 2267206 A1 20101229 - BUCKEYE TECHNOLOGIES INC [US]
- [A] US 2021002827 A1 20210107 - LUO YUPING [US], et al
- [A] JP 2015232196 A 20151224 - JUJO PAPER CO LTD, et al
- [A] JP 2011021283 A 20110203 - DAIO SEISHI KK
- [A] WO 2008114884 A1 20080925 - RICOH KK [JP], et al
- [A] JP 2010281015 A 20101216 - OJI TOKUSHUSHI KK, et al
Designated contracting state (EPC)
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 state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 22188829 A 20220804; IT 202200012278 A 20220609