Bright and vivid structural color appears on fabric surface and the fabric texture is faintly visily,demonstrating that 10 vol% concentration of the p(st-maa) colloidal microsphere in ink might be enough to fabricate intact photonic crystals on fabric substrates.Then it is found that the excessive concentrations from 20 vol% to 100 vol% in ink easily produce much thicker photonic crystal films on fabric substrates, making the fabric texture less visible and many distinct cracks appear on the surface of photonic crystals.Therefore,in our experiments,an appropriate concentration of P(st-maa) colloidal microsphere in ink is about 10 vol%