Hi All,
Verification of UDI's was mentioned briefly in this thread.
I thought I'd spin out another thread as I think this warrants some discussion.
The above criteria seem highly technical. Can anyone enlighten me as to what these actually mean? Are these requirements quite strict (i.e. in most printing situations is there actually a concern that you might not meet these requirements)?
I'm tinkering with the 2D GS1 DataMatrix format, and the system seems to me to be incredibly robust. I can print out a 0.8cm x 0.8cm (24x24 dots) matrix on a cheap $30 label maker (180dpi) and my phone can read it just fine.
It seems to me that the only 2 concerns should be:
1. Ability of the UDI to be scanned. If it can be scanned easily with a free cell-phone app, isn't that verification enough?
2. Indelibility of the marking. (I'm going with the 60601-1 marking durability test for this).
Other than that, is it really necessary to consider "quality grade", "aperture" and "wavelength"?
Verification of UDI's was mentioned briefly in this thread.
Bar code verifiers test print quality. The quality measurements should be per ISO/IEC 15416 for linear symbols and ISO/IEC 15415 for 2D symbols.
For linear bar codes, ISO/IEC 15416 specifies that the minimum symbol grade shall be 1.5/10/660 where:
• minimum print quality grade at point of production = 1.5 (C)
• measurement aperture = 0.254 mm = 0.010 inches (that is what the "10" above signifies)
• inspection wavelength = 660 nanometers +/- 10 nanometers
I thought I'd spin out another thread as I think this warrants some discussion.
The above criteria seem highly technical. Can anyone enlighten me as to what these actually mean? Are these requirements quite strict (i.e. in most printing situations is there actually a concern that you might not meet these requirements)?
I'm tinkering with the 2D GS1 DataMatrix format, and the system seems to me to be incredibly robust. I can print out a 0.8cm x 0.8cm (24x24 dots) matrix on a cheap $30 label maker (180dpi) and my phone can read it just fine.
It seems to me that the only 2 concerns should be:
1. Ability of the UDI to be scanned. If it can be scanned easily with a free cell-phone app, isn't that verification enough?
2. Indelibility of the marking. (I'm going with the 60601-1 marking durability test for this).
Other than that, is it really necessary to consider "quality grade", "aperture" and "wavelength"?
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