User manual

DataSTORM
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left half can use a mixture of sets A and B. It is the pattern of the mixture which determines the 13th
character. For example if the left hand half of the code used ABBAAB then the 13th digit would be 5.
In common with other symbologies, EAN has a set of allowed tolerances for the quality of the printed
code. These measurements relate to the maximum variation in the width of a single bar or space and
vary according to magnification factor:
Magnification
Factor
80%
85%
90%
95%
100%
105%
110%
115%
120%
125%
130%
135%
140%
Tolerance
µ (microns)
±35µ
±51µ
±69µ
±85µ
±101µ
±108µ
±115µ
±124µ
±132µ
±140µ
±147µ
±152µ
±163µ
As the above table shows, the tolerances allowed reduce rapidly for magnification factors below 100%.
For this reason the final print method should be considered carefully when choosing a magnification
factor. For example, some printing processes are too variable to consistently print small (e.g. 80%)
EAN codes.