Prevention of back-staining in stone washing
AssigneeNovo Nordisk
InventorsMasahiro Onishi, Merete Fich, Annette Hanne Toft, Martin Schulein
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Abstract
This invention relates to a method of forming localized variation of color density in the surface of a dyed cellulosic fabric, and to a composition for use in the method.
Claims16
A method of forming localized variation of color density in the surface of a dyed cellulosic fabric, comprising agitating the fabric in an aqueous medium having a pH in the range 6.5-9 and containing:
- a first component which is either
- (a) a cellulase of Family 5 which is able to hydrolyze p-nitrophenyl-.beta.-1,4-cellobioside, or
- (b) a cellulase of Family 7,
- and a second component which is either
- (a) a mechanical abrading agent or
- (b) a cellulase having abrading activity, and which is different from said first component;
- wherein each cellulase displays at least 30% of its maximum activity at pH 7.
A cellulase composition comprising:
- a first component which is either
- (a) a cellulase of Family 5 which is able to hydrolyze p-nitrophenyl-.beta.-1,4-cellobioside, or
- (b) a cellulase of Family 7,
- and a second component which is either
- (a) a mechanical abrading agent or
- (b) a cellulase having abrading activity and which is different from said first component;
- wherein each cellulase displays at least 30% of its maximum activity at pH 7 and wherein the composition can be used in an aqueous medium having a pH in the range of 6.5-9 for forming localized variation of color density in the surface of a dyed cellulosic fabric.
A method of forming localized variation of color density in the surface of a dyed cellulosic fabric, comprising agitating the fabric in an aqueous medium having a pH in the range 6.5-9 and containing:
- (i) a first component which is either
- (a) a cellulase of Family 5 which is able to hydrolyze p-nitrophenyl-.beta.-1,4-cellobioside, or
- (b) a cellulase of Family 7, and
- (ii) a second component which is a cellulase having abrading activity and which is different from said first component;
- wherein each cellulase displays at least 30% of its maximum activity at pH 7.
A cellulase composition comprising:
- (i) a first component which is either
- (a) a cellulase of Family 5 which is able to hydrolyze p-nitrophenyl-.beta.-1,4-cellobioside, or
- (b) a cellulase of Family 7, and
- (ii) a second component which is a cellulase having abrading activity and which is different from said first component;
- wherein each cellulase displays at least 30% of its maximum activity at pH 7.
Dependencies are inferred from the claim text.