A series of experiments are conducted using printing samples to investigate the effects of different gloss and different color-difference magnitudes. The results are used to reveal these effects. In addition, seven different color spaces basded on CIELAB DIN99, OSA and CIECAM02 are tested using these data. It is found that comparing the performance of local uniformity and global uniformity, OSA-Gp-Eu and DIN99d always perform the best, and all spaces outperform CIELAB and OSA.