All vector files must use AI or EPS format, font conversion to Path, all bitmap files must be EPS or JPG format, resolution greater than the original size of 600 DPI, CMYK color mode. Remarks: Metal ring bacteria of different colors should not be less than 0.7 mm Metal faeces separated from the same color area should not be less than 0.5 mm Color area should not be less than 2mm square For the printing process, you provide higher resolution files that we can provide better product results. To get the best print results, it is recommended that your image have a resolution above 600DPI for a long time