Appendix B: Code 128 Information
Here's why bar code 1 is wider:
∙The 8 numbers in each example appear in groups of four or more, and they appear in
∙The 6 alphabetic characters will use code B.
Look at the example again. This time, data is underlined when the character set changes.
The bar code for data arranged like this:
Bar code 1
Data = 1234ABC5678DEF
is wider than data arranged like this:
Bar code 2
Data = 12345678ABCDEF
This shows that bar code width varies depending on how data is arranged. Separating numeric and alphabetic characters reduces the number of character set changes. Fewer
character set changes reduce bar code width. Code128 Appendix Information B:
