All vector files must be in AI or EPS format with the font converted to path, And all bitmap files must be in EPS or JPG format with resolution greater than 600 DPI in the original size, and CMYK Color mode.
Remarks:
Metals cloisons separating different colours should be no smaller than 0.7mm
Metal cloisons separating areas of the same colour should be no smaller than 0.5mm
Coloured area should be no smaller than 2mm Square
For Print process, the higher resolutions file you offer, the better products result we can offer.
To have the best print result, strongely suggest the resolution of your image above 600DPI