Silk fabrics dyed with green tea extracts was treated with the six mordants, and then a color developing effects, change of surface color by mordants, the light fastness and laundering fastness were examined. K/S of dyed silk fabrics were increased with increasing temperature and time of dyeing, especially above 60˚C. The color state was appeared as 9.4YR 7.5/2.4 , dyeing concentration has increased, generally it changed in the color with a smack of yellow. By the treatment of FeCl₂, showed considerable change. as higher as the density of treatment. the color state was changed from the order of yellow to the order of red. Seeing by naked eyes, it changed to gray or black order by the degree of low clearness. By the treatment of SnCl₂, the density of treatment is becoming higher, degree of clearness was becoming high, and appeared change of color state in the direction of clock hands Munsell color rim. The light fastness of dyed fabrics was improved, but SnCl₂ mordant treatment deteriorated the light fastness. Laundering fastness of dyed silk fabrics in case of both not treated mordant and treated mordant were good.
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