Printing method for a packaging, the packaging, and printing system thereof

摘要

A printing method for an ink jet printer to print first density information and second dot density information, including arranging a plurality of print heads including two or more first print heads to have a first angular orientation for printing the first information, and at least a second print head to have a second angular orientation, different from the first angular orientation for printing the second information; printing the first information by the first print heads to obtain the first dot density; and printing the second information by the second print head to obtain the second dot density.