请总结以下这篇文献主要解决什么技术问题？为了解决这个技术问题，提出了什么样的技术方案？利用这样的技术方案，有什么样的有益效果？	"The invention related to methods for laundry of fabrics and enzyme compositions for use in said method. In particular the invention relates to foam compositions comprising one or more enzymes.
Generally laundry is performed by agitating the fabrics in a detergent solution for a certain period of time followed by rinsing the fabrics in water. Laundry may be performed in an automatised washing machine or it may be performed as a handwash. Modern detergents are complex compositions comprising a number of components such as surfactants, builders, bleach, polymers and enzymes, usually formulated as a powder or a liquid.
Several modifications of the laundry process and the detergent compositions have been suggested in order to increase the performance of the laundry process or in order to reduce the water or energy consumption of the laundry.
WO 9820100A1 discloses detergent compositions comprising enzymes in form of a foam, a device for dispensing such a composition e.g. an aerosol can, and a process for washing laundry using the foam. The process comprises dispensing the foam on the laundry or in water to prepare suds, optionally a holding period and finally agitating, rinsing conditioning etc.
U.S. Pat. No. 6,303,563 discloses detergent compositions comprising enzymes in form of a foam further comprising a diester or diamide quaternary ammonium compound and optionally a boron enzyme stabilizer. Further a process for washing laundry is disclosed comprising dispensing the foam on the laundry or in water to prepare suds, optionally a holding period and finally agitating, rinsing conditioning etc.
EP 86935 discloses a method of washing soiled textile goods where foam is created and blown on the textile. The benefit of the method is that it can be performed using small amounts of detergent and water. The document does not mention enzymes.
U.S. Pat. No. 5,435,809 discloses a method of treating denim textiles in order to obtain a “stonewashed” appearance where the textile is treated with a foam comprising cellulases.
EP 677 577 discloses detergent composition in form of a foam. In the examples enzyme are included in the foam. In use the compositions are distributed on prewetted textiles and optionally soaked for a time period, followed by addition of water and agitating the mixture.
GB 2,417,492 discloses a detergent dispenser for delivering detergent in e.g. a dishwasher. The document discusses the possibility of including different detergent compositions in different chambers in the cartridge in order to deliver different compositions in different stages of the washing programme.
In one aspect the present invention relates to a method for laundering fabrics comprising the steps of:
a) Distributing a foam composition comprising enzymes over fabrics followed by a holding period, and
b) Adding water and preferably a detergent composition and agitating the mixture.
Each of these steps can be repeated.
In a second aspect the invention relates to a foam composition comprising one or more foaming agents and one or more enzymes. The enzymes are preferably selected among a protease, lipase, a cutinase, an amylase, a carbohydrase, a cellulase, a pectinase, a mannanase, an arabinase, a galactanase, a xylanase, an oxidase, e.g., a laccase, and/or a peroxidase, provided that the foam composition comprises at least one non cellulytic enzyme. Additional components of the foam composition comprise pH regulating agents and enzyme stabilizing agents.
In an even further aspect the invention relates to a device capable of performing the method according to the invention."