Patent ID: 7206433

Claim:
A method for printing address and/or postage information containing both a human-readable Image viewable under white light and a machine-readable luminescent Image that emits light .in a first wavelength range under illumination by second shorter wavelength light such as ultraviolet light, the method comprising the steps of: comparing available module sizes for printing a 2-D bar code to provide a machine-readable luminescent Image which is largely invisible under white light, to available font sizes and styles for printing address and/or postage information containing a human-readable Image viewable under white light; based on the determination, selecting a combination of module size for printing a 2-D bar code and font size and style for printing address and/or postage information to permit reading of the 2-D bar code to a predetermined readability rate despite the presence of overlap; and printing address and/or postage information containing both a human-readable image viewable under white light and a machine-readable luminescent image.