Color stable treated fabric and method of making the same

A method for treating a fiber or fabric comprising:

• a) providing a fiber or fabric;
• b) providing a transition metal-polymer complex solution comprising:
• a first polymer comprising
• polymerized units of a monomer X, wherein the monomer X is vinylimidazole, and polymerized units of a monomer Y, wherein the monomer Y is at least one ester of polymerized units of ethylene oxide, and
• a second polymer comprising
• polymerized units of the monomer X and polymerized units of a monomer Z, wherein the monomer Z is a non-heterocyclic saturated compound selected from acrylic acid, (meth)acrylic acid, ethyl acrylate, butyl acrylate and combinations thereof, and
• a transition metal, wherein the transition metal is silver ion,
• wherein the molar ratio of monomer X to transition metal is from 24:1 to 117:1, said molar ratio being calculated based on the total amount of monomer X from all monomer X sources combined with the transition metal;
• and
• c) contacting the fiber or fabric with the transition metal-polymer complex solution.