Wool fabrics were terted with dichloro isocyanuric acid(DCCA) and dyed with acid dyes(C.I. Acid Red 18), and then were terted by sputter etching. Wool fabrics had been sputtered with aluminium under various conditions such as sputter etching time and discharge power in the presence of argon gas. We compared colour difference and fastness properties of these samples. colour difference of sputtered wool fadrics changed with sputter etching time, discharge power, and dyeing time. Changes in L(metric lightness) and C(metric chroma) of dyed wool fabrics with various sputter etching times and discharge power were difference in accordance with the dyeing time.